I do not know if A is correct

Cullumber Trucks uses the periodic inventory method and had the following purchases of toy trucks during the month of December. Cullumber sold 84 trucks during the month. Answer the following questions. (a) Your answer has been saved. See score details after the due date. How much is the dollar value of the ending inventory on December 31 if the average cost method is used? Ending inventory $ Attempts: 1 of 1 used (b) How much is the dollar value of the ending inventory on December 31 and the cost of goods sold during December if the LIFO inventory method is used