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Inventories (Details) - USD ($) $ in Thousands | Jul. 27, 2019 | Apr. 27, 2019
--- | --- | ---
Inventories |  |
Raw materials | $ 94,384 | $ 90,359
Work in process | 13,514 | 13,728
Finished goods | 111,469 | 114,478
FIFO inventories | 219,367 | 218,565
Excess of FIFO over LIFO | (21,666) | (21,666)
Total inventories | $ 197,701 | $ 196,899

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