Perpetual Inventory Using FIFO Beginning inventory purchases, and sales for Item Zeta are as follows: Oct. 1 Inventory 36 units $24 2 28 units 15 Purchase 41 units $29 Sale 17 units Assung 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 - Cost of goods sold on October 24 . Inventory on October 31