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Inventories
12 Months Ended
Dec. 30, 2023
Inventory, Net [Abstract]  
Inventories Inventories
We used the LIFO method of accounting for approximately 91.4% of Inventories at December 30, 2023 and 92.4% of Inventories at December 31, 2022. As a result of changes in the LIFO reserve, we recorded a decrease to Cost of sales of $94.6
million in 2023 and an increase to Cost of sales of $311.8 million in 2022 and a decrease to Cost of sales of $122.3 million in 2021.

Purchasing and warehousing costs included in Inventories as of December 30, 2023 and December 31, 2022 were $576.9 million and $635.9 million.

Inventory balances were as follows:
December 30, 2023December 31, 2022
Inventories at first-in, first-out (“FIFO”)$5,041,752 $5,174,918 
Adjustments to state inventories at LIFO(184,050)(278,649)
Inventories at LIFO$4,857,702 $4,896,269