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EMPLOYEES' RETIREMENT PLANS (Details) - USD ($) | 12 Months Ended
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Jul. 31, 2021 | Jul. 31, 2020
Retirement Benefits [Abstract] |  |
Pension contributions | $ 441,512 | $ 424,401
Employer contributions | $ 64,771 | $ 59,434
Minimum contribution rate | 9.10% |

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