Vaughn has the following inventory data: July 1 Beginning inventory 31 units at $61 5 Purchases 184 units at $57 14 Sale 122 units 21 Purchases 92 units at $59 30 Sale 86 units Assuming that a perpetual inventory system is used, what is the cost of goods sold on a LIFO basis for July? $12040 $12028 $11980 $12272