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Note 12 - Inventories - Inventories by Category and Impact of Using LIFO Method (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Mar. 31, 2020
Finished products $ 317,654 $ 351,251
In process 25,175 31,173
Raw materials and supplies 128,987 173,474
Total 471,816 555,898
Less excess of FIFO cost over LIFO cost 128,672 144,267
Inventories $ 343,144 $ 411,631