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Inventories (Tables)
9 Months Ended
Nov. 30, 2016
Inventories Tables  
Inventories
   November 30,
2016
   February 29,
2016
 
         
Finished goods  $606,063   $549,106 
Work in process   427,999    118,415 
Raw materials and subassemblies   911,738    1,452,566 
Total   1,945,800    2,120,087 
Less: Allowance   (227,710)   (174,704)
Net inventories  $1,718,090   $1,945,383