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Inventories (Tables)
3 Months Ended
May 31, 2013
Inventories Tables  
Inventories
   May 31,   February 28, 
   2013   2013 
         
Finished goods  $507,352   $561,298 
Work in process   427,916    385,092 
Consignment   -    9,728 
Raw materials and subassemblies   981,635    1,073,492 
Total   1,916,903    2,029,610 
Less: Allowance   (213,782)   (200,439)
Net inventories  $1,703,121   $1,829,171