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Inventories
9 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES
We used the last-in, first-out (LIFO) method of valuing inventories for 41 percent and 40 percent of total inventories at March 31, 2019 and June 30, 2018, respectively. Since inventory valuations under the LIFO method are based on an annual determination of quantities and costs as of June 30 of each year, the interim LIFO valuations are based on our projections of expected year-end inventory levels and costs. Therefore, the interim financial results are subject to any final year-end LIFO inventory adjustments.
Inventories consisted of the following: 
(in thousands)
March 31, 2019
 
June 30, 2018
Finished goods
$
309,182

 
$
279,240

Work in process and powder blends
261,074

 
232,973

Raw materials
101,887

 
96,859

Inventories at current cost
672,143

 
609,072

Less: LIFO valuation
(83,530
)
 
(83,606
)
Total inventories
$
588,613

 
$
525,466