Oct 1 7 Sale 15 Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales for Item Zetas are as follows: Inventory 50 units $24 38 units Purchase 55 unts $28 18 units Assuming a perpetual inventory system and using the first-in, first-out (FIFO) method, determine (a} the cost of goods sold on October 24 and () the inventory on October 31 a cost of goods sold on October 24 b. Inventory on October 31 24 Sale