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3. Inventories (Tables)
9 Months Ended
Sep. 30, 2018
Inventories Tables Abstract  
Inventories
Inventories consist of :  

September 30,

2018

   

December 31,

2017

 
Materials   $ 1,844,604     $ 1,524,728  
Work in process     90,137       1,149  
Finished goods     4,366,053       3,676,426  
Total   $ 6,300,794     $ 5,202,303