Assume Bargain.com began March with 8 units of inventory that cost a total of $120. During March, Bargain.com purchased and sold goods as follows: Mar. 8 Purchase 24 units @ $16 14 Sale 20 units @ $32 22 Purchase 16 units @ $18 27 Sale 24 units @ $32 Under the FIFO inventory costing method and the perpetual inventory system, how much is Bargain.com's cost of goods sold for the sale on March 14? A. $312 OB. $640 OC. $504 OD. $320