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CONCENTRATION OF CREDIT RISK (Tables) | 3 Months Ended
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Jun. 30, 2023
Accounts Receivable |
Concentration of credit risk and major customers |
Schedule of accounts receivable from customers who accounted for more than 10% of our net sales | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2023 | ​ | March 31, 2023 |
Customer |  | Dollars |  | Percent |  | Dollars |  | Percent |
A | ​ | $ | 991,695 |  | 33 | % | $ | 730,514 |  | 31 | %
B | ​ | $ | * |  | * | % | $ | 260,177 |  | 11 | %
C | ​ | $ | 728,548 |  | 25 | % | $ | * |  | * | %
D | ​ | $ | * |  | * | % | $ | 265,755 |  | 11 | %
*less than 10% of total

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