eBookShow Me How Question Content Area Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales for Item Zeta9 are as follows: Oct. 1 Inventory 56 units @ $24 7 Sale 40 units 15 Purchase 45 units @ $28 24 Sale 23 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 (b) the inventory on October 31.