Perpetual Inventory Using LIFO Beginning inventory, purchases, and sales data for DVD players are as follows: November 1 10 15 20 24 30 Inventory Sale Purchase Sale Sale Purchase 120 units at $39 90 units 140 units at $40 110 units 45 units 160 units at $43 The business maintains a perpetual inventory system, costing by the last-in, first-out method Determine the cost of goods sold for each sale and the inventory balance after each sale, presenting the data in the form illustrated in Exhibit 4. Under LIFO, if units are in inventory at two different costs, enter the units with the HIGHER unit cost first in the Cost of Goods Sold Unit Cost column and LOWER unit cost first in the Inventory Unit Cost column