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Note 4 - Inventories (Tables)
3 Months Ended
Feb. 29, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

February 29,

   

November 30,

 
   

2020

   

2019

 

Raw materials

  $ 171,896     $ 150,338  

Finished goods

    209,079       186,929  

Total inventories

  $ 380,975     $ 337,267