Beginning inventory, purchases, and sales for Item Zeta9 are as follows: Oct. 1 Inventory 45 units @$24 7 Sale. 32 units 15 Purchase 31 units @ $28 24 Sale 19 units Assuming a perpetual inventory system and using the first-in, first-out (FIFO) method, determine (a) the cost of the goods sold on October 24 and (b) the inventory value on October 31. a. Cost of the goods sold on October 24 b. Inventory value on October 31