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4. INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2017
Inventories Tables  
Inventories
    2017     2016  
Materials   $ 1,524,728     $ 888,830  
Work in process     1,149       27,708  
Finished goods     3,676,426       4,010,074  
Total   $ 5,202,303     $ 4,926,612