Waterway Bookstore had 460 units on hand at January 1, costing $9 each. Purchases and sales during the month of January were as follows: Waterway does not maintain perpetual inventory records. According to a physical count, 260 units were on hand at January 31. The cost of the inventory at January 31, under the FIFO method is: $2840. $2600. $2860. $2340