Britt Company uses the perpetual inventory system and the LIFO method. The following information is available for the month of May: May 1 10 15 Beginning inventory Purchase Sales Purchase Sales Purchase 20 units @ $6 20 units @ $7 12 units 10 units @ $9 18 units 10 units @ $10 18 21 30 Instructions Prepare a schedule to show cost of goods sold and the value of the ending inventory for the month of May