Ames Manufacturing reported the following. What is cost of goods sold? Revenue $450,000 Beginning inventory of direct materials 20,000 Purchases of direct materials 156,000 Ending inventory of direct materials 18,000 Direct manufacturing labor 21,000 Indirect manufacturing costs 42,000 Beginning inventory of finished goods 40,000 Ending inventory of finished goods 45,000 Sales and administrative expenses 150,000 $118,000 $109,000 $112,000 $103,000