Perpetual Inventory Using UFO The following units of a particular ibem were available for sale during the calendar year: The firm maintains a perpetual inventory system. Determine the cost of goods sola for each sale and the invertary balance after each sale, assuming the la method. Present the data in the form Illustrated in Eahibit 4. Under LiO, If units are in inventary ot two-or more different costs, enter the units with the LOr in the Inventory Unit Cost coluenn