Perpetual Inventory Using UFO Beginning inventory, purchases, and sales data for DVD players are as follows: The business maintains a perpetual inventory system, costing by the last-in, first-out method. Determine the cost of poods soid soid for each sale and the inventory balance after each sale, presenting the data in the form ilustrated in Exhibit 4. Under UFO, it units are in inventory at two different couts, enter the units with the HIGHEA unit cost first in the Cost of Goods Sold Unic Cost cofume and LOWeR unit cost first in the Inventory Unit Cost column. LOWER unt cost first in the Inventory Unit Cost column