Kelcie Sports uses the dollar-value LIFO retail method. The price index on January 1, 2016, was 100, and on that date the inventory was $20,000 (retail) and $14,000 (cost). Additional information follows: 2016 2017 Purchases, retail $160,000 $204,000 Purchases, cost 115,200 150,960 Sales 160,416 202,160 Price index, Dec. 31. 102 103 What is the cost of the December 31, 2017, inventory (to the nearest dollar)? a. $14,610 b. $14,638 c. $14,660 d. $15,854