Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales for Item Zeta9 are as follows: Oct. 1 Inventory 68 units @ $19 7 Sale 48 units 15 Purchase 79 units @ $20 24 Sale 27 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 $fill in the blank 1 b. Inventory value on October 31 $fill in the blank 2