Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales for Item Zeta 9 are as follows: 71 units @ $23 Oct. 1 Inventory 7 Sale 51 units 45 units @ $27 15 Purchase 24 Sale 26 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 a. Cost of goods sold on October 24 b. Inventory on October 31 $