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Inventories (Tables)
3 Months Ended
Jul. 24, 2021
Inventory Disclosure [Abstract]  
Summary of inventories
A summary of inventories is as follows:

(Unaudited, amounts in thousands)7/24/214/24/21
Raw materials$141,508 $112,371 
Work in process30,720 24,791 
Finished goods130,269 121,182 
FIFO inventories302,497 258,344 
Excess of FIFO over LIFO(38,043)(32,207)
Total inventories$264,454 $226,137