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Marketable Securities (Tables)
3 Months Ended
Oct. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of investment income
           
   Three Months Ended
October 31
 
   2024   2023 
Dividend and interest income  $4,963   $9,245 
Net unrealized (loss) on marketable securities       (163,567)
Total  $4,963   $(154,322)