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Inventories
6 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
INVENTORIES INVENTORIES
We used the last-in, first-out (LIFO) method of valuing inventories for 40 percent and 43 percent of total inventories at December 31, 2020 and June 30, 2020, respectively. Inventory valuations under the LIFO method are based on an annual determination of quantities and costs as of June 30 of each year; therefore, the interim LIFO valuations are based on our projections of expected year-end inventory levels and costs and are subject to any final year-end LIFO inventory adjustments.
Inventories consisted of the following: 
(in thousands)December 31, 2020
June 30, 2020
Finished goods$316,120 $318,071 
Work in process and powder blends180,032 190,041 
Raw materials64,915 75,589 
Inventories at current cost561,067 583,701 
Less: LIFO valuation(63,843)(61,254)
Total inventories$497,224 $522,447