Swifty has the following inventory data:

July 1		Beginning inventory		23 units at $46
5		Purchases		137 units at $43
14		Sale		91 units
21		Purchases		68 units at $44
30		Sale		64 units

Assuming that a perpetual inventory system is used, what is the cost of goods sold on a LIFO basis for July?

$6729

$6820

$6741

$6681