Beginning inventory, purchases, and sales for Product XCX are as follows: Sep. 1 Beginning Inventory 25 units $14 5 Sale 13 units 17 Purchase 26 units $15 30 Sale 15 units Assuming a perpetual inventory system and the last-in, first-out method, determine (a) the cost of the goods sold September 30 sale and (b) the inventory on September 30. a) Cost of goods sold b) Inventory, September 30