Transactions for the month of June were: Purchases Sales June 1 (balance) 3,200@ $3.20 June 2 2,400 @ $5.50 June 3 8,800 @ 3.10 June 6 6,400 @ 5.50 June 7 4,800 @ 3.30 June 9 4,000 @ 5.50 June 15 7,200 @ 3.40 June10 1,600 @ 6.00 June 18 2,000 @ 3.50 June 22 5,600 @ 6.00 June25 800 @ 6.00 Assuming that perpetual inventory records are kept in dollars, the ending inventory on a FIFO basis is a. $16,440. b. $16,640. c. $17,160. d. $17,880.