| Schedule of concentration of risk by factors |
| | | September 30, 2017 | | March 31, 2017 | | | Customer | | Dollars | | Percent | | Dollars | | Percent | | | A | | $ | 1,478,882 | | | 68 | % | $ | * | | | * | % | | B | | $ | 308,638 | | | 14 | % | $ | 961,463 | | | 51 | % | | C | | $ | * | | | * | % | $ | 406,428 | | | 22 | % | | D | | $ | * | | | * | % | $ | 187,410 | | | 10 | % | *less than 10% of total
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| Schedule of concentration of risk by factors |
| | | Three months ended
September 30, 2017 | | Three months ended
September 30, 2016 | | Six months ended
September 30, 2017 | | Six months ended
September 30, 2016 | | | Customer | | Dollars | | Percent | | Dollars | | Percent | | Dollars | | Percent | | Dollars | | Percent | | | A | | $ | 2,061,276 | | | 45 | % | $ | 383,253 | | | 10 | % | $ | 4,950,432 | | | 48 | % | $ | * | | | * | % | | B | | $ | 746,877 | | | 16 | % | $ | * | | | * | % | $ | 2,330,088 | | | 22 | % | $ | 1,457,222 | | | 18 | % | | C | | $ | * | | | * | % | $ | * | | | * | % | $ | 1,079,832 | | | 10 | % | $ | * | | | * | % | | D | | $ | * | | | * | % | $ | 1,998,724 | | | 55 | % | | * | | | * | % | $ | 3,285,065 | | | 40 | % | | E | | $ | * | | | * | % | $ | * | | | * | % | | * | | | * | % | $ | 1,741,084 | | | 21 | % | *less than 10% of total
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