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Inventories (Tables)
3 Months Ended
Mar. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following: 
 
March 31,
2018
 
December 30,
2017
Raw materials
$
135,327

 
$
129,287

Work in process
213,029

 
226,659

Finished goods
1,696,324

 
1,519,044

 
$
2,044,680

 
$
1,874,990