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Inventories (Tables)
6 Months Ended
Aug. 31, 2014
Inventories Tables  
Inventories
   August 31,
2014
  February 28,
2014
       
Finished goods  $474,025   $445,035 
Work in process   565,562    402,377 
Raw materials and subassemblies   1,221,710    1,022,496 
Total   2,261,297    1,869,908 
Less: Allowance   (255,093)   (195,093)
Net inventories  $2,006,204   $1,674,815