18. The financial statements of Walgreen Co., which uses LIFO, reported the following information (in millions). 2018 Cost of sales Inventories, net LIFO reserve 2017 $51,098 $50,900 7,036 1,897 6,852 2,100 If Walgreen's had used the FIFO method of inventory costing in 2018, COGS would have been. A) $48,998 million B) $51,301 million C) $53,198 million D) $50,895 million E) None of the above