4. Costs and Estimated Earnings on Uncompleted Contracts: Schedule of Costs incurred on uncompleted contracts and Estimated earnings (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
May 31, 2025 |
May 31, 2024 |
|
| Details | ||
| Costs incurred on uncompleted contracts | $ 12,499,313 | $ 10,576,401 |
| Costs incurred on uncompleted contracts, Estimated earnings | 13,175,240 | 10,459,240 |
| Costs incurred on uncompleted contracts, Gross | 25,674,553 | 21,035,641 |
| Costs incurred on uncompleted contracts, Billings to date | 24,696,121 | 22,280,350 |
| Costs incurred on uncompleted contracts, Net | $ 978,432 | $ (1,244,709) |