Beginning inventory, purchases, and sales for Item Zeta 9 are as follows: Oct. 1 Inventory Sale 7 71 units 522 49 units 62 units $24 28 units 15 Purchase Sale 24 Assuming a 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. a. Cost of goods sold on October 24 b. Inventory on October 31