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INVENTORIES | 3 Months Ended
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Mar. 31, 2022
INVENTORIES |
INVENTORIES | NOTE 9 — INVENTORIES Inventories in the Condensed Consolidated Balance Sheets are comprised of the following components: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​
​ |  | March 31, 2022 |  | December 31, 2021
Raw materials | ​ | $ | 174,515 | ​ | $ | 143,394
Work-in-process | ​ |  | 108,927 | ​ |  | 97,834
Finished goods | ​ |  | 316,339 | ​ |  | 298,691
Total | ​ | $ | 599,781 | ​ | $ | 539,919
​ At March 31, 2022 and December 31, 2021, approximately 36% of total inventories were valued using the last-in, first-out ("LIFO") method. The excess of current cost over LIFO cost was $121,064 and $114,176 at March 31, 2022 and December 31, 2021, respectively.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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