v3.26.3
Inventories (Tables)
 6 Months Ended
Jun. 30, 2026
Notes and other explanatory information [abstract]  
Schedule of inventories

 

   As of June 30, 2026 
   Cost   Allowance for
valuation loss		   Book value 
Merchandise inventory:               
Raw materials  $498,278   $(6,646)  $491,632 
Work in progress   36,467    (195)   36,272 
Finished goods   512,946    (26,605)   486,341 
   $1,047,691   $(33,446)  $1,014,245 

 

   As of December 31, 2025 
   Cost   Allowance for
valuation loss		   Book value 
Merchandise inventory:               
Raw materials  $522,432   $(6,747)  $515,685 
Work in progress   19,491    (14)   19,477 
Finished goods   521,722    (26,516)   495,206 
   $1,063,645   $(33,277)  $1,030,368 
Schedule of cost of inventories

The cost of inventories recognized for the period:

 

   Six months ended   Six months ended 
   June 30, 2026   June 30, 2025 
Cost of goods sold  $5,804,895   $7,745,274 
Loss on (reversal of loss on) inventory valuation   712    (4,549)
Cost of inventories  $5,805,607   $7,740,725