Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales for Item Zeta9 are as follows: Oct. 1 Inventory 69 units @ $21 7 Sale 50 units 15 Purchase 75 units @ $24 24 Sale 23 units Assuming a perpetual inventory system and using the first-in, first-out (FIFO) method, determine (a) the cost of the goods sold on October 24 and (b) the inventory value on October 31