please quick

Purchases Sales Jan 1 Jan 22,400 @ $5.50 3,200 @3.20 8,800 @3.10 4,800 @3.30 7,200 @ 3.40 2,000 @ 3.50 6 9 10 7 15 22 6,400 @ 5.50 4,000 @ 5.50 1,600 @ 6.00 5,600 @ 6.00 800 @ 6.00 18 25 Under a perpetual inventory system, the ending inventory on a LIFO basis is $17,880. 0 $17,160. O $16,640. $16,440