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Accounts Receivable (Tables)
6 Months Ended
Nov. 30, 2018
Receivables [Abstract]  
Schedule of accounts receivable

Accounts receivable consisted of the following:

 

   November 30,
2018
  May 31,
2018
    (Unaudited)      
Accounts receivable  $38,587   $32,733 
Less: Allowance for bad debts   (3,039)   (2,742)
   $35,548   $29,991