Perpetual Inventory Using FIO Beginning inventory purchases, and sales for Item Zeta are as follows Oct. 1 Inventory 75 units 520 7 Sale 53 units 15 Purchase 63 units $22 24 Sale 26 units Awning a perpetual inventory wstem and using the natin, rst out (Fro) method, determine (a) the cost of goods sold on October 24 and (b) the inventory on October 31 Cost of goods sold on October 24 b. Inventory on October 31 II x