Perpetual inventory using FIFO Beginning inventory, purchases, and sales for Item Zeta9 are as follows: Date Line Item Description Value Oct. 1 Inventory 74 units @ $15 Oct. 7 Sale 53 units Oct. 15 Purchase 67 units @ $16 Oct. 24 Sale 30 units 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 fill in the blank 1 of 2 b. Inventory on October 31 fill in the blank 2 of 2