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12. Segment Information: Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Details) - USD ($)
 3 Months Ended
Nov. 30, 2017
Nov. 30, 2016
Details    
United States sales $ 8,899,759 $ 9,881,253
Canada sales 364,173 268,062
Europe sales 5,073 12,408
Mexico/Latin America sales 79,958 233,594
Middle East sales 12,209  
Asia/Pacific sales $ 52,798 $ 26,487