Beginning inventory, purchases, and sales for an inventory item are as follows: Sept. 1 Beginning Inventory 24 units @ $14 5 Sale 14 units 17 Purchase 21 units $17 30 Sale 16 units Assuming a perpetual inventory system and the last in, first-out method, determine (a) the cost of the merchandise sold for the September 30 sale and (b) the inventory on September 30. a. Cost of merchandise sold b. Inventory, September 30