Inventories consist of the following at December 31, 2016 and 2015:
 
 
 
2016
 
2015
 
Raw materials
 
$
531,053
 
$
299,952
 
Work in progress
 
 
370,740
 
 
666,124
 
Finished goods
 
 
855,991
 
 
868,559
 
Total
 
$
1,757,784
 
$
1,834,635