Beginning inventory, purchases, and sales for an inventory item are as follows: Sept. 1 Beginning inventory 34 units $23 5 Sale 20 units 17 Purchase 37 units $26 30 Sale 36 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 b. Inventory, September 30