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Inventories
6 Months Ended
Jun. 30, 2020
Inventories  
Inventories

Note 3. Inventories

Inventories are stated at lower of cost or net realizable value. Cost is determined using a weighted average cost method for raw materials and supplies, and on a first-in, first-out basis for other inventory. Inventory consisted of the following (in thousands):

June 30,

December 31,

2020

2019

Raw materials

$

589,122

$

686,831

Supplies

483,323

498,298

Work in progress

150,139

154,669

Finished goods

344,433

349,245

Total inventories

$

1,567,017

$

1,689,043