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Inventories
9 Months Ended
Sep. 30, 2023
Inventory Disclosure [Abstract]  
Inventories Inventories
The Corporation’s residential building products inventories, and a majority of its workplace furnishings inventories, are valued at cost, on the "last-in, first-out" (LIFO) basis. Remaining inventories are generally valued at the lower of cost, on the "first-in, first-out" (FIFO) basis, or net realizable value. Inventories included in the Condensed Consolidated Balance Sheets consisted of the following:
September 30,
2023
December 31,
2022
Finished products, net$142.6 $121.0 
Materials and work in process, net140.6 112.8 
LIFO allowance(54.3)(53.7)
Total inventories, net$228.9 $180.1 
Inventory valued by the LIFO costing method91 %91 %

The increase in inventory during the current year-to-date period is primarily due to the acquisition of Kimball International.

In addition to the LIFO allowance, the Corporation recorded inventory allowances of $13.9 million and $14.9 million as of September 30, 2023 and December 31, 2022, respectively, to adjust for excess and obsolete inventory or otherwise reduce FIFO-basis inventory to net realizable value.