Beginning inventory, purchases, and sales for an inventory item are as follows: Sep. 1 Beginning Inventory 21 units $13 5 Sale 12 units 17 Purchase 22 units $14 30 Sale 23 units Assuming a perpetual inventory system and the first-in, first-out method, determine (a) the cost of the goods sold for the September 30 sale and (b) the inventory on September 30.

a. Cost of goods sold $

b. Inventory, September 30 $