4. Costs and Estimated Earnings on Uncompleted Contracts: Schdule of Status of Projects in progress (Details)	May 31, 2023 USD ($)	May 31, 2022 USD ($)
Details
Number of Projects in progress	22	19
Aggregate percent complete	33.00%	47.00%
Aggregate amount remaining	$ 18,061,484	$ 7,627,234
Percentage of total value invoiced to customer	29.00%	35.00%