DEE7-3 2 353 PE7-3A Perpetual inventory using LIFO 0B).3 Beginning inventory Inventory Sale Purchase Sale 80 units at $175 Sept. 1 10 18 27 65 units 75 units at $180 70 units Assuming a perpetual inventory system and using the last-in, first-out (LIFO) method determine (a) the cost of merchandise sold on September 27 and (b) the inventory September 30. on