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Inventories
 3 Months Ended
Mar. 31, 2018
Inventories  
Inventories

3.  Inventories

Major classes of inventory at March 31, 2018, December 31, 2017 and March 31, 2017 are as follows:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

March 31,

 

December 31,

 

March 31,

 

 

 

    

2018

    

2017

    

2017

   

 

Finished goods

 

$

901

 

$

873

 

$

889

 

 

Raw materials

 

 

120

 

 

122

 

 

124

 

 

Operating supplies

 

 

44

 

 

41

 

 

38

 

 

 

 

$

1,065

 

$

1,036

 

$

1,051