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5. INVENTORY
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
INVENTORY
5. INVENTORY

 

Inventories are stated at the lower of cost and net realizable value. Costs are determined using the first in-first out (FIFO) method. As of December 31, 2020 and 2019, inventory consists of the following:

 

    December 31,  
    2020     2019  
Finished goods   $     $ 716,478  
Work in process     559,582       303,594  
Raw materials     544,605       835,232  
Inventory allowance     (11,424 )     (11,424 )
Total inventory   $ 1,092,763     $ 1,843,880