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Inventories (Tables)
9 Months Ended
Nov. 30, 2017
Inventories Tables  
Inventories
   November 30,
2017
   February 28,
2017
 
         
Raw materials and subassemblies  $1,153,908   $1,197,506 
Finished Goods   413,595    369,428 
Work in process   268,036    28,460 
Total   1,835,539    1,595,394 
Less: Allowance   (332,311)   (254,710)
Net inventories  $1,503,228   $1,340,684