Current Attempt in Progress Waterway Bookstore had 520 units on hand at January 1, costing $9 each. Purchases and sales during the month of January were as follows: Purchases Sales 450 @$14 Date Jan. 14 17 25 29 200 @ $12 200 @ $10 280 @ $16 Waterway does not maintain perpetual inventory records. According to a physical count, 190 units were on hand at January 31. The cost of the inventory at January 31, under the LIFO method is: $2280 O $1710 O $1880. O $1900