Inventory consisted of the following:

 

 

 

December 31,

 

 

 

2016

 

 

2015

 

Raw materials

 

$

51,250

 

 

$

46,115

 

Work-in-process

 

 

167,788

 

 

 

150,289

 

Finished goods

 

 

136,088

 

 

 

75,279

 

Total inventory

 

$

355,126

 

 

$

271,683