Assume shoptop.com began September with 8 units of inventoryS hat cost total of $144. During September, Shoptop purchased and soled goods as follows: Date # of units Cost/unit Begin Inventory on hand 8 $18 Sep 8 Purchase 24 $19 Sep 14 Sale 20 $38 Sep 22 Purchase 16 $21 Sep 27 Sale 24 $38 Under the FIFO inventoy method, how much is Shoptop's cost of goods sold for the sale of September 14? a. $600 b. $390 c. $372 d. 760