Beginning inventory, purchases, and sales for an inventory item are as follows: Sept. 1 Beginning inventory 25 units @ $21 5 Sale 14 units 17 Purchase 26 units @ $22 30 Sale 28 units Assuming a perpetual inventory system and the first-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 $fill in the blank 1 b. Inventory, September 30 $fill in the blank 2