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6. Income Taxes: Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($)
 12 Months Ended
Aug. 31, 2018
Aug. 31, 2017
Details    
Current Federal Tax Expense (Benefit) $ 1,083,541 $ 1,516,880
Current State and Local Tax Expense (Benefit) 228,332 217,184
Other Tax Expense Benefit, depreciation (20,036) (22,800)
Other Tax Expense Benefit, inventory reserve (22,956) 39,357
Other Tax Expense (Benefit) 19,394 7,982
Current [1] 1,288,275 1,758,603
Current Income Tax Expense (Benefit) 1,288,275 1,758,603
Deferred income taxes 70,509 (20,009)
Income tax expense benefit net $ 1,358,784 $ 1,738,594
[1] Note 6