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3. Inventory (Tables)
3 Months Ended
Aug. 31, 2014
Inventory
    August 31,     May 31,  
    2014     2014  
Raw materials   $ 1,273,150     $ 1,043,411  
Finished goods     748,968       572,754  
Total inventory   $ 2,022,118     $ 1,616,165