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DEFERRED CHARGES (Narrative) (Details) - USD ($)
12 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Amortization of deferred charges $ 385,967 $ 297,887
Weighted average life of current year additions to deferred charges 14 years