Perpetual Inventory Using FIFO Bepinning inventory, purchases, and sales for item zeta9 are as follows: Assuming a perpetual inventory system and using the first-in, first-out (FIFO) method, determine (a)the cost of goods sold on Cctober 24 and (b) the inventory on October 31 . a. Cost of goods sold on Dctober 24 b. Inventory on October 31