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Inventories (Tables)
9 Months Ended
Nov. 30, 2014
Inventories Tables  
Inventories
   November 30,
2014
   February 28,
2014
 
         
Finished goods  $520,536   $445,035 
Work in process   693,478    402,377 
Raw materials and subassemblies   1,223,414    1,022,496 
Total   2,437,428    1,869,908 
Less: Allowance   (285,093)   (195,093)
Net inventories  $2,152,335   $1,674,815