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Inventories | 9 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Mar. 31, 2019
Inventory Disclosure [Abstract] |  |
Inventories | NOTE 3 – INVENTORIES At December 31, 2019 and March 31, 2019, the inventory balances are composed of:
|  | December 31, 2019 |  |  | March 31, 2019 |
Finished product |  | $ | 2,767,106 |  |  | $ | 2,628,241 |
Raw materials |  |  | 1,661,208 |  |  |  | 1,635,130 |
Work in process |  |  | 594,666 |  |  |  | 509,226 |
|  | $ | 5,022,980 |  |  | $ | 4,772,597 |
| NOTE 4 – INVENTORIES At March 31, 2019, March 31, 2018, December 31, 2017, the inventory balances consisted of the following:
|  | March 31, 2019 |  |  | March 31, 2018 |  |  | December 31, 2017 |
Finished product |  | $ | 2,628,241 |  |  | $ | 809,680 |  |  | $ | 1,007,291 |
Raw materials |  |  | 1,635,130 |  |  |  | 1,471,666 |  |  |  | 764,810 |
Work in process |  |  | 509,226 |  |  |  | 123,661 |  |  |  | 20,213 |
|  | $ | 4,772,597 |  |  | $ | 2,405,007 |  |  | $ | 1,792,314 |

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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