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INVENTORY (Tables)
6 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventory balances by category
Inventory balances by category were as follows:
 
September 30, 2019
 
March 31, 2019
Finished products
$
34,408

 
$
24,847

Parts and supplies
4,885

 
3,353

Inventory
$
39,293

 
$
28,200