10. Brown Bookstore had 250 units on hand at October 1, costing $6 each. Purchases and sales during the month of October were as follows: Date Purchases Sales Oct. 5 200 @ $12 10 150 @ $7 20 200 @ $8 30 150 @ $16 Brown does not maintain perpetual inventory records. According to a physical count, 250 units were on hand at October 31. The cost of the inventory at October 31, under the FIFO method is: a. $1,500. b. $1,950. c. $3,900. d. $4,015