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5. INVENTORY
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
INVENTORY
  5. INVENTORY

 

Inventories are stated at the lower of cost or net realizable value. Costs are determined using the first in- first out (FIFO) method. As of December 31, 2018 and 2017, inventory consists of the following:

 

    December 31,     December 31,  
    2018     2017  
Finished goods   $     $ 1,716,141  
Work in process     443,701       311,481  
Raw materials     698,689       300,479  
Inventory reserve     (11,424 )     (8,601 )
Inventory, net   $ 1,130,966     $ 2,319,500