Glass Floors has the following inventory data: Beginning inventory 15 units at $4.00 1 July 5 Purchases July July 14 Sale 21 Purchases July July 30 Sale each 60 units at $4.40 each 40 units 30 units at $4.80 each 28 units Assuming that a perpetual inventory system is used, what is the cost of goods sold on al LIFO basis for July? $310.40 $157.60 $468.00 O $232.00