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Inventory (Tables)
3 Months Ended
Aug. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory

Inventory consists of the following:

 

   August 31, 2019   May 31, 2019 
Raw materials  $2,165,268   $1,295,991 
Finished goods   1,890,250    1,325,000 
Total inventory  $4,055,518   $2,620,991