Davidson Electronics has the following: Unit Cost Units Inventory, Jan. 1 5,000 Purchase, April 2 15,000 Purchase, Aug. 28 20,000 $8 10 12 If Davidson has 7,000 units on hand at December 31, how much is the cost of ending inventory under the average-cost method in a periodic inventory system? O $75.250 O $70,000 O $84.000 O $56,000