<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 6.5a -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: https://www.novaworks.com -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#Cover" roleURI="http://callanjmb.com/role/Cover" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#BalanceSheets" roleURI="http://callanjmb.com/role/BalanceSheets" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#BalanceSheetsParenthetical" roleURI="http://callanjmb.com/role/BalanceSheetsParenthetical" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#StatementsOfOperations" roleURI="http://callanjmb.com/role/StatementsOfOperations" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#StatementsOfStockholdersEquity" roleURI="http://callanjmb.com/role/StatementsOfStockholdersEquity" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#StatementsOfCashFlows" roleURI="http://callanjmb.com/role/StatementsOfCashFlows" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#CybersecurityRiskManagementAndStrategyDisclosure" roleURI="http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#MaterialCybersecurityIncidentDisclosure" roleURI="http://xbrl.sec.gov/cyd/role/MaterialCybersecurityIncidentDisclosure" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#NatureOfOperations" roleURI="http://callanjmb.com/role/NatureOfOperations" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#Reorganization" roleURI="http://callanjmb.com/role/Reorganization" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfSignificantAccountingPolicies" roleURI="http://callanjmb.com/role/SummaryOfSignificantAccountingPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#PropertyAndEquipment" roleURI="http://callanjmb.com/role/PropertyAndEquipment" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#AccruedExpenses" roleURI="http://callanjmb.com/role/AccruedExpenses" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#OperatingLeases" roleURI="http://callanjmb.com/role/OperatingLeases" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#CommitmentsAndContingencies" roleURI="http://callanjmb.com/role/CommitmentsAndContingencies" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#RelatedPartyTransactions" roleURI="http://callanjmb.com/role/RelatedPartyTransactions" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#IncomeTaxes" roleURI="http://callanjmb.com/role/IncomeTaxes" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#Segments" roleURI="http://callanjmb.com/role/Segments" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#Equity" roleURI="http://callanjmb.com/role/Equity" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ShareBasedCompensation" roleURI="http://callanjmb.com/role/ShareBasedCompensation" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SubsequentEvents" roleURI="http://callanjmb.com/role/SubsequentEvents" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfSignificantAccountingPoliciesPolicies" roleURI="http://callanjmb.com/role/SummaryOfSignificantAccountingPoliciesPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ReorganizationTables" roleURI="http://callanjmb.com/role/ReorganizationTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfSignificantAccountingPoliciesTables" roleURI="http://callanjmb.com/role/SummaryOfSignificantAccountingPoliciesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#PropertyAndEquipmentTables" roleURI="http://callanjmb.com/role/PropertyAndEquipmentTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#AccruedExpensesTables" roleURI="http://callanjmb.com/role/AccruedExpensesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#OperatingLeasesTables" roleURI="http://callanjmb.com/role/OperatingLeasesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#RelatedPartyTransactionsTables" roleURI="http://callanjmb.com/role/RelatedPartyTransactionsTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#IncomeTaxesTables" roleURI="http://callanjmb.com/role/IncomeTaxesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#EquityTables" roleURI="http://callanjmb.com/role/EquityTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ShareBasedCompensationTables" roleURI="http://callanjmb.com/role/ShareBasedCompensationTables" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#NatureOfOperationsDetailsNarrative" roleURI="http://callanjmb.com/role/NatureOfOperationsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfUnauditedProFormaFinancialInformationDetails" roleURI="http://callanjmb.com/role/ScheduleOfUnauditedProFormaFinancialInformationDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ReorganizationDetailsNarrative" roleURI="http://callanjmb.com/role/ReorganizationDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfAllowanceForCreditLossesDetails" roleURI="http://callanjmb.com/role/ScheduleOfAllowanceForCreditLossesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfConcentrationOfRiskDetails" roleURI="http://callanjmb.com/role/ScheduleOfConcentrationOfRiskDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfInventoryDetails" roleURI="http://callanjmb.com/role/ScheduleOfInventoryDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesDetails" roleURI="http://callanjmb.com/role/ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfDisaggregatedRevenuesDetails" roleURI="http://callanjmb.com/role/ScheduleOfDisaggregatedRevenuesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" roleURI="http://callanjmb.com/role/ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfDerivativeLiabilityDetails" roleURI="http://callanjmb.com/role/ScheduleOfDerivativeLiabilityDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfSignificantAccountingPoliciesDetailsNarrative" roleURI="http://callanjmb.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfPropertyAndEquipmentDetails" roleURI="http://callanjmb.com/role/ScheduleOfPropertyAndEquipmentDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#PropertyAndEquipmentDetailsNarrative" roleURI="http://callanjmb.com/role/PropertyAndEquipmentDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfAccruedExpensesDetails" roleURI="http://callanjmb.com/role/ScheduleOfAccruedExpensesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#OperatingLeasesDetailsNarrative" roleURI="http://callanjmb.com/role/OperatingLeasesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfSupplementalBalanceSheetInformationLeaseCashFlowDetails" roleURI="http://callanjmb.com/role/ScheduleOfSupplementalBalanceSheetInformationLeaseCashFlowDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfLeaseRelatedAssetsAndLiabilitiesDetails" roleURI="http://callanjmb.com/role/ScheduleOfLeaseRelatedAssetsAndLiabilitiesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfMaturityLeasePaymentsForOperatingLeasesDetails" roleURI="http://callanjmb.com/role/ScheduleOfMaturityLeasePaymentsForOperatingLeasesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#CommitmentsAndContingenciesDetailsNarrative" roleURI="http://callanjmb.com/role/CommitmentsAndContingenciesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfRelatedPartyRentExpensesDetails" roleURI="http://callanjmb.com/role/ScheduleOfRelatedPartyRentExpensesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#RelatedPartyTransactionsDetailsNarrative" roleURI="http://callanjmb.com/role/RelatedPartyTransactionsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfProvisionForStateIncomeTaxesDetails" roleURI="http://callanjmb.com/role/ScheduleOfProvisionForStateIncomeTaxesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" roleURI="http://callanjmb.com/role/ScheduleOfDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfReconciliationBetweenEffectiveTaxRateOnIncomeFromContinuingOperationsAndStatutoryRateDetails" roleURI="http://callanjmb.com/role/ScheduleOfReconciliationBetweenEffectiveTaxRateOnIncomeFromContinuingOperationsAndStatutoryRateDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#IncomeTaxesDetailsNarrative" roleURI="http://callanjmb.com/role/IncomeTaxesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfFairValueAssumptionsDetails" roleURI="http://callanjmb.com/role/ScheduleOfFairValueAssumptionsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfDerivativeLiabilityEquityLineOfCreditDetails" roleURI="http://callanjmb.com/role/ScheduleOfDerivativeLiabilityEquityLineOfCreditDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#EquityDetailsNarrative" roleURI="http://callanjmb.com/role/EquityDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfStockOptionsActivityDetails" roleURI="http://callanjmb.com/role/SummaryOfStockOptionsActivityDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfFairValueOfOptionsDetails" roleURI="http://callanjmb.com/role/SummaryOfFairValueOfOptionsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfFairValueOfEachMarketBasedAwardsGrantedDetails" roleURI="http://callanjmb.com/role/SummaryOfFairValueOfEachMarketBasedAwardsGrantedDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfRestrictedStockAwardsDetails" roleURI="http://callanjmb.com/role/SummaryOfRestrictedStockAwardsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ScheduleOfRestrictedStockUnitsAreExpectedToVestDetails" roleURI="http://callanjmb.com/role/ScheduleOfRestrictedStockUnitsAreExpectedToVestDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SummaryOfFairValueOfStockWarrantsDetails" roleURI="http://callanjmb.com/role/SummaryOfFairValueOfStockWarrantsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#ShareBasedCompensationDetailsNarrative" roleURI="http://callanjmb.com/role/ShareBasedCompensationDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cjmb-20251231.xsd#SubsequentEventsDetailsNarrative" roleURI="http://callanjmb.com/role/SubsequentEventsDetailsNarrative" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/Cover" xlink:title="00000001 - Document - Cover" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/BalanceSheets" xlink:title="00000002 - Statement - Consolidated Balance Sheets">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaapAssetsCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaapCashAndCashEquivalentsAtCarryingValue" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapCashAndCashEquivalentsAtCarryingValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaapAccountsReceivableNetCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapAccountsReceivableNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaapInventoryNet" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapInventoryNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="loc_us-gaapOtherReceivablesNetCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapOtherReceivablesNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="loc_us-gaapIncomeTaxesReceivable" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapIncomeTaxesReceivable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaapOtherAssetsCurrent" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapOtherAssetsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredOfferingCosts" xlink:label="loc_us-gaapDeferredOfferingCosts" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapDeferredOfferingCosts" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="loc_us-gaapAssets" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaapOperatingLeaseRightOfUseAsset" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapOperatingLeaseRightOfUseAsset" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecurityDeposit" xlink:label="loc_us-gaapSecurityDeposit" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapSecurityDeposit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaapLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaapAccountsPayableCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccountsPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaapAccruedLiabilitiesCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccruedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxesPayableCurrent" xlink:label="loc_us-gaapTaxesPayableCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapTaxesPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="loc_us-gaapContractWithCustomerLiabilityCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapContractWithCustomerLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityCurrent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapOperatingLeaseLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaapLiabilitiesNoncurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityNoncurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_us-gaapOperatingLeaseLiabilityNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesNoncurrent" xlink:label="loc_us-gaapDerivativeLiabilitiesNoncurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_us-gaapDerivativeLiabilitiesNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="loc_us-gaapDeferredIncomeTaxLiabilitiesNet" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_us-gaapDeferredIncomeTaxLiabilitiesNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaapLiabilities" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaapStockholdersEquity" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaapPreferredStockValue" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapPreferredStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaapCommonStockValue" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapCommonStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaapAdditionalPaidInCapital" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAdditionalPaidInCapital" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaapRetainedEarningsAccumulatedDeficit" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapRetainedEarningsAccumulatedDeficit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaapLiabilitiesAndStockholdersEquity" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaapCommitmentsAndContingencies" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapCommitmentsAndContingencies" xlink:type="arc" weight="1" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapStockholdersEquity" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/BalanceSheetsParenthetical" xlink:title="00000003 - Statement - Consolidated Balance Sheets (Parenthetical)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/StatementsOfOperations" xlink:title="00000004 - Statement - Consolidated Statements of Operations">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaapGrossProfit" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues" xlink:label="loc_us-gaapRevenues" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapRevenues" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaapCostOfRevenue" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapCostOfRevenue" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaapOperatingIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapGrossProfit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaapSellingGeneralAndAdministrativeExpense" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapSellingGeneralAndAdministrativeExpense" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaapAssetImpairmentCharges" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapAssetImpairmentCharges" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaapNonoperatingIncomeExpense" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOther" xlink:label="loc_us-gaapInterestIncomeOther" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapInterestIncomeOther" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating" xlink:label="loc_us-gaapInterestExpenseNonoperating" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapInterestExpenseNonoperating" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_EquityLineOfCreditFacilityTransactionExpenses" xlink:label="loc_CJMBEquityLineOfCreditFacilityTransactionExpenses" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_CJMBEquityLineOfCreditFacilityTransactionExpenses" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:label="loc_us-gaapGainLossOnDerivativeInstrumentsNetPretax" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapGainLossOnDerivativeInstrumentsNetPretax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapOperatingIncomeLoss" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapNonoperatingIncomeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaapIncomeTaxExpenseBenefit" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapIncomeTaxExpenseBenefit" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/StatementsOfStockholdersEquity" xlink:title="00000005 - Statement - Consolidated Statements of Stockholders&apos; Equity" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/StatementsOfCashFlows" xlink:title="00000006 - Statement - Consolidated Statements of Cash Flows">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapNetIncomeLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaapProvisionForDoubtfulAccounts" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapProvisionForDoubtfulAccounts" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaapDepreciationAndAmortization" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapDepreciationAndAmortization" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:label="loc_us-gaapGainLossOnDerivativeInstrumentsNetPretax" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapGainLossOnDerivativeInstrumentsNetPretax" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncashExpense" xlink:label="loc_us-gaapOtherNoncashExpense" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapOtherNoncashExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaapShareBasedCompensation" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapShareBasedCompensation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_ImpairmentLossOnPropertyAndEquipment" xlink:label="loc_CJMBImpairmentLossOnPropertyAndEquipment" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_CJMBImpairmentLossOnPropertyAndEquipment" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsReceivable" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsReceivable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaapIncreaseDecreaseInInventories" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInInventories" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInIncomeTaxesReceivable" xlink:label="loc_us-gaapIncreaseDecreaseInIncomeTaxesReceivable" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInIncomeTaxesReceivable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets" xlink:label="loc_us-gaapIncreaseDecreaseInOtherCurrentAssets" />
      <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInOtherCurrentAssets" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability" xlink:label="loc_us-gaapIncreaseDecreaseInOperatingLeaseLiability" />
      <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInOperatingLeaseLiability" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsPayableAndAccruedLiabilities" />
      <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaapIncreaseDecreaseInDeferredRevenue" />
      <link:calculationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInDeferredRevenue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedTaxesPayable" xlink:label="loc_us-gaapIncreaseDecreaseInAccruedTaxesPayable" />
      <link:calculationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccruedTaxesPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDeferredLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInDeferredLiabilities" />
      <link:calculationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInDeferredLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaapPaymentsToAcquirePropertyPlantAndEquipment" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_us-gaapPaymentsToAcquirePropertyPlantAndEquipment" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromRelatedPartyDebt" xlink:label="loc_us-gaapProceedsFromRelatedPartyDebt" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromRelatedPartyDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt" xlink:label="loc_us-gaapProceedsFromRepaymentsOfRelatedPartyDebt" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromRepaymentsOfRelatedPartyDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_ProceedsFromDeferredOfferingCosts" xlink:label="loc_CJMBProceedsFromDeferredOfferingCosts" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_CJMBProceedsFromDeferredOfferingCosts" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaapPaymentsOfDividends" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapPaymentsOfDividends" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaapRepaymentsOfLongTermDebt" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapRepaymentsOfLongTermDebt" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_ProceedsFromIpoAndOverallotmentNet" xlink:label="loc_CJMBProceedsFromIpoAndOverallotmentNet" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_CJMBProceedsFromIpoAndOverallotmentNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:label="loc_us-gaapProceedsFromIssuanceOrSaleOfEquity" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromIssuanceOrSaleOfEquity" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" xlink:title="00000012 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure" />
    <link:calculationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/cyd/role/MaterialCybersecurityIncidentDisclosure" xlink:title="00000013 - Disclosure - Material Cybersecurity Incident Disclosure" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/NatureOfOperations" xlink:title="999014 - Disclosure - NATURE OF OPERATIONS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/Reorganization" xlink:title="999015 - Disclosure - REORGANIZATION" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfSignificantAccountingPolicies" xlink:title="999016 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/PropertyAndEquipment" xlink:title="999017 - Disclosure - PROPERTY AND EQUIPMENT" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/AccruedExpenses" xlink:title="999018 - Disclosure - ACCRUED EXPENSES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/OperatingLeases" xlink:title="999019 - Disclosure - OPERATING LEASES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/CommitmentsAndContingencies" xlink:title="999020 - Disclosure - COMMITMENTS AND CONTINGENCIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/RelatedPartyTransactions" xlink:title="999021 - Disclosure - RELATED PARTY TRANSACTIONS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/IncomeTaxes" xlink:title="999022 - Disclosure - INCOME TAXES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/Segments" xlink:title="999023 - Disclosure - SEGMENTS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/Equity" xlink:title="999024 - Disclosure - EQUITY" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ShareBasedCompensation" xlink:title="999025 - Disclosure - SHARE BASED COMPENSATION" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SubsequentEvents" xlink:title="999026 - Disclosure - SUBSEQUENT EVENTS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:title="999027 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ReorganizationTables" xlink:title="999028 - Disclosure - REORGANIZATION (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:title="999029 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/PropertyAndEquipmentTables" xlink:title="999030 - Disclosure - PROPERTY AND EQUIPMENT (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/AccruedExpensesTables" xlink:title="999031 - Disclosure - ACCRUED EXPENSES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/OperatingLeasesTables" xlink:title="999032 - Disclosure - OPERATING LEASES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/RelatedPartyTransactionsTables" xlink:title="999033 - Disclosure - RELATED PARTY TRANSACTIONS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/IncomeTaxesTables" xlink:title="999034 - Disclosure - INCOME TAXES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/EquityTables" xlink:title="999035 - Disclosure - EQUITY (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ShareBasedCompensationTables" xlink:title="999036 - Disclosure - SHARE BASED COMPENSATION (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/NatureOfOperationsDetailsNarrative" xlink:title="999037 - Disclosure - NATURE OF OPERATIONS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfUnauditedProFormaFinancialInformationDetails" xlink:title="999038 - Disclosure - SCHEDULE OF UNAUDITED PRO FORMA FINANCIAL INFORMATION (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ReorganizationDetailsNarrative" xlink:title="999039 - Disclosure - REORGANIZATION (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfAllowanceForCreditLossesDetails" xlink:title="999040 - Disclosure - SCHEDULE OF ALLOWANCE FOR CREDIT LOSSES (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfConcentrationOfRiskDetails" xlink:title="999041 - Disclosure - SCHEDULE OF CONCENTRATION OF RISK (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfInventoryDetails" xlink:title="999042 - Disclosure - SCHEDULE OF INVENTORY (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesDetails" xlink:title="999043 - Disclosure - SCHEDULE OF PROPERTY AND EQUIPMENT ESTIMATED USEFUL LIVES (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfDisaggregatedRevenuesDetails" xlink:title="999044 - Disclosure - SCHEDULE OF DISAGGREGATED REVENUES (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" xlink:title="999045 - Disclosure - SCHEDULE OF ANTIDILUTIVE SECURITIES EXCLUDED FROM COMPUTATION OF EARNINGS PER SHARE (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfDerivativeLiabilityDetails" xlink:title="999046 - Disclosure - SCHEDULE OF DERIVATIVE LIABILITY (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:title="999047 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfPropertyAndEquipmentDetails" xlink:title="999048 - Disclosure - SCHEDULE OF PROPERTY AND EQUIPMENT (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaapPropertyPlantAndEquipmentGross" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:to="loc_us-gaapPropertyPlantAndEquipmentGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaapAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:to="loc_us-gaapAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_AssetImpairmentCharge" xlink:label="loc_CJMBAssetImpairmentCharge" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:to="loc_CJMBAssetImpairmentCharge" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/PropertyAndEquipmentDetailsNarrative" xlink:title="999049 - Disclosure - PROPERTY AND EQUIPMENT (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfAccruedExpensesDetails" xlink:title="999050 - Disclosure - SCHEDULE OF ACCRUED EXPENSES (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaapAccruedLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedPayrollTaxesCurrent" xlink:label="loc_us-gaapAccruedPayrollTaxesCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapAccruedPayrollTaxesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_AccruedCreditCardCurrent" xlink:label="loc_CJMBAccruedCreditCardCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_CJMBAccruedCreditCardCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:label="loc_us-gaapAccruedProfessionalFeesCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapAccruedProfessionalFeesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SettlementLiabilitiesCurrent" xlink:label="loc_us-gaapSettlementLiabilitiesCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapSettlementLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_AccruedStorageExpenses" xlink:label="loc_CJMBAccruedStorageExpenses" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_CJMBAccruedStorageExpenses" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedInsuranceCurrent" xlink:label="loc_us-gaapAccruedInsuranceCurrent" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapAccruedInsuranceCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaapOtherAccruedLiabilitiesCurrent" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapOtherAccruedLiabilitiesCurrent" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/OperatingLeasesDetailsNarrative" xlink:title="999051 - Disclosure - OPERATING LEASES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfSupplementalBalanceSheetInformationLeaseCashFlowDetails" xlink:title="999052 - Disclosure - SCHEDULE OF SUPPLEMENTAL BALANCE SHEET INFORMATION LEASE CASH FLOW (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfLeaseRelatedAssetsAndLiabilitiesDetails" xlink:title="999053 - Disclosure - SCHEDULE OF LEASE RELATED ASSETS AND LIABILITIES (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfMaturityLeasePaymentsForOperatingLeasesDetails" xlink:title="999054 - Disclosure - SCHEDULE OF MATURITY LEASE PAYMENTS FOR OPERATING LEASES (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueYearTwo" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueYearThree" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueYearFour" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueYearFive" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/CommitmentsAndContingenciesDetailsNarrative" xlink:title="999055 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfRelatedPartyRentExpensesDetails" xlink:title="999056 - Disclosure - SCHEDULE OF RELATED PARTY RENT EXPENSES (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/RelatedPartyTransactionsDetailsNarrative" xlink:title="999057 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfProvisionForStateIncomeTaxesDetails" xlink:title="999058 - Disclosure - SCHEDULE OF PROVISION FOR STATE INCOME TAXES (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaapIncomeTaxExpenseBenefit" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaapCurrentStateAndLocalTaxExpenseBenefit" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeTaxExpenseBenefit" xlink:to="loc_us-gaapCurrentStateAndLocalTaxExpenseBenefit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaapDeferredFederalIncomeTaxExpenseBenefit" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeTaxExpenseBenefit" xlink:to="loc_us-gaapDeferredFederalIncomeTaxExpenseBenefit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaapDeferredStateAndLocalIncomeTaxExpenseBenefit" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeTaxExpenseBenefit" xlink:to="loc_us-gaapDeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:title="999059 - Disclosure - SCHEDULE OF DEFERRED TAX ASSETS AND DEFERRED TAX LIABILITIES (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaapDeferredTaxAssetsGross" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:label="loc_us-gaapDeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsCharitableContributionCarryforwards" xlink:label="loc_us-gaapDeferredTaxAssetsCharitableContributionCarryforwards" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsCharitableContributionCarryforwards" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_DeferredTaxAssetsDepreciation" xlink:label="loc_CJMBDeferredTaxAssetsDepreciation" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_CJMBDeferredTaxAssetsDepreciation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cjmb-20251231.xsd#CJMB_DeferredTaxAssetsRightOfUseAssetsNet" xlink:label="loc_CJMBDeferredTaxAssetsRightOfUseAssetsNet" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_CJMBDeferredTaxAssetsRightOfUseAssetsNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsStateTaxes" xlink:label="loc_us-gaapDeferredTaxAssetsStateTaxes" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsStateTaxes" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:label="loc_us-gaapDeferredTaxAssetsOperatingLossCarryforwardsDomestic" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:label="loc_us-gaapDeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsDerivativeInstruments" xlink:label="loc_us-gaapDeferredTaxAssetsDerivativeInstruments" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsDerivativeInstruments" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits" xlink:label="loc_us-gaapDeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaapDeferredTaxAssetsOther" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsGross" xlink:to="loc_us-gaapDeferredTaxAssetsOther" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaapDeferredTaxAssetsNet" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsNet" xlink:to="loc_us-gaapDeferredTaxAssetsGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaapDeferredTaxAssetsValuationAllowance" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapDeferredTaxAssetsNet" xlink:to="loc_us-gaapDeferredTaxAssetsValuationAllowance" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfReconciliationBetweenEffectiveTaxRateOnIncomeFromContinuingOperationsAndStatutoryRateDetails" xlink:title="999060 - Disclosure - SCHEDULE OF RECONCILIATION BETWEEN EFFECTIVE TAX RATE ON INCOME FROM CONTINUING OPERATIONS AND THE STATUTORY RATE (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderTaxEffectPercent" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationCrossBorderTaxEffectPercent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationCrossBorderTaxEffectPercent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaapEffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEffectiveIncomeTaxRateContinuingOperations" xlink:to="loc_us-gaapEffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/IncomeTaxesDetailsNarrative" xlink:title="999061 - Disclosure - INCOME TAXES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfFairValueAssumptionsDetails" xlink:title="999062 - Disclosure - SCHEDULE OF FAIR VALUE ASSUMPTIONS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfDerivativeLiabilityEquityLineOfCreditDetails" xlink:title="999063 - Disclosure - SCHEDULE OF DERIVATIVE LIABILITY EQUITY LINE OF CREDIT (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/EquityDetailsNarrative" xlink:title="999064 - Disclosure - EQUITY (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfStockOptionsActivityDetails" xlink:title="999065 - Disclosure - SUMMARY OF STOCK OPTIONS ACTIVITY (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfFairValueOfOptionsDetails" xlink:title="999066 - Disclosure - SUMMARY OF FAIR VALUE OF OPTIONS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfFairValueOfEachMarketBasedAwardsGrantedDetails" xlink:title="999067 - Disclosure - SUMMARY OF FAIR VALUE OF EACH MARKET BASED AWARDS GRANTED (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfRestrictedStockAwardsDetails" xlink:title="999068 - Disclosure - SUMMARY OF RESTRICTED STOCK AWARDS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ScheduleOfRestrictedStockUnitsAreExpectedToVestDetails" xlink:title="999069 - Disclosure - SCHEDULE OF RESTRICTED STOCK UNITS ARE EXPECTED TO VEST (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SummaryOfFairValueOfStockWarrantsDetails" xlink:title="999070 - Disclosure - SUMMARY OF FAIR VALUE OF STOCK WARRANTS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/ShareBasedCompensationDetailsNarrative" xlink:title="999071 - Disclosure - SHARE BASED COMPENSATION (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://callanjmb.com/role/SubsequentEventsDetailsNarrative" xlink:title="999072 - Disclosure - SUBSEQUENT EVENTS (Details Narrative)" />
</link:linkbase>
