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Inventories
9 Months Ended
Sep. 30, 2021
Inventories  
Inventories

4. Inventories

Major classes of inventory at September 30, 2021, December 31, 2020 and September 30, 2020 are as follows:

September 30,

December 31,

September 30,

    

2021

    

2020

    

2020

Finished goods

$

651

$

675

$

625

Raw materials

 

120

 

129

 

121

Operating supplies

 

37

 

37

 

36

$

808

$

841

$

782