Use this inventory information for the month of June to answer questions 32 - 44. June 1 Beginning inventory 10 units @ $120 5 Purchase 60 units @ $112 14 Sale 40 units 21 Purchase 30 units @ $116 30 Sale 28 units 40. Assuming that a perpetual inventory system is used, calculate the cost of goods sold under the average-cost method. a. $3,648.56 b. $3,664.56 c. $7,733.56 d. $7,752.56 41. Assuming that a perpetual inventory system is used, calculate the cost of ending inventory under the FIFO method. a. $3,664 b. $3,704 C. $7,696 d. $7,736 42. Assuming that a perpetual inventory system is used, calculate the cost of goods sold under the FIFO method. a. $3,664 b. $3,704 c. $7,696 d. $7,736