8- ABC Inc. purchased inventory as follows: Jan. 10200 units at $5.00 Jan. 20500 units at $10.00 Jan. 30800 units at $15.00 ABC Inc. had no beginning inventory and has 500 units on hand as of January.31. Assuming the average method is used, cost of goods sold would be a) $7,500 b) $12,000 c) $5,000 d) $6,000 e) 0