6. Beginning inventory. purchases, and sales for an inventory item are as follows: Jan. Beginning Inventory 27 units $13 16 units S15 30units $20 28 units $14 #7 Purchase 18 Sale 31 Purchase , make the Assuming a perpetual inventory system and the last-in. first-out method appropriate journal entries for each date (if necessary). and determine ending inventory fo each date. All sales are made on account