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Inventories
3 Months Ended
Jan. 31, 2020
Inventory Disclosure [Abstract]  
Inventories

6. Inventories:

 

Inventories consisted of the following:

 

     January 31, 2020   October 31, 2019
Raw materials   $ 2,296,135     $ 2,035,612  
Work in process     1,417,361       1,239,861  
Finished goods     128,584       843,584  
    $ 3,842,080     $ 4,119,057