Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales for Item Yetare as follows: Oct 1 Inventory 39 units 520 7 Sale 33 units 15 Purchase 25 units 523 Sale 15 units Assuming a perpetual inventory system and using the first first-out (FIFO) method, determine the cost of goods sold on October 2t and the story on October a. Cost of goods sold on October 24 b. Inventory on October 31