0 & Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales for Item Zeta9 are as follows: 55 units @ $19 C Oct. 1 Inventory 7 Sale 46 units 15 Purchase 36 units @ $21 24 Sale 14 units Assuming a perpetual inventory system and using the first-in, first-out (FIFO) method, dermine (a) the a. Cost of goods sold on October 24 b. Inventory on October 31 out (FIFO) method, dermine (a) the cost of goods sold on October 24 and (b) the inventory on October 31.