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Inventories
6 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Inventories Inventories

Inventories, net consist of:
 
 
September 30, 2018
 
March 31, 2018
Raw materials
 
$
100,318

 
$
92,216

Work-in-process
 
113,554

 
136,068

Finished goods
 
182,532

 
185,950

Total
 
$
396,404

 
$
414,234