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Inventories
 3 Months Ended
Mar. 31, 2018
Inventories  
Inventories

4.Inventories

 

The major components of inventories are as follows:

 

 

 

 

 

 

 

 

 

 

    

Mar 31, 2018

    

Dec 31, 2017

 

 

 

 

 

 

 

 

 

Raw materials

 

$

1,563,864

 

$

1,428,924

 

Work-in-progress

 

 

359,337

 

 

423,186

 

Finished goods

 

 

1,632,650

 

 

1,416,547

 

Reduction to LIFO cost

 

 

(1,187,020)

 

 

(1,182,592)

 

 

 

 

 

 

 

 

 

Total Inventories

 

$

2,368,831

 

$

2,086,065