Consider the following data: Work in process Raw materials Finished Goods Other Data: July 1 July 31 7,000 12,000 15,000 ? ? 20,000 Cost of goods manufactured 135,000 Factory overhead cost 60,000 Gross margin 60,000 Raw materials purchases 30,000 Raw materials used 40,000 Sales 200,000 The total cost of goods sold is: O a. P140.000 O d. P160,000 b. P135,000 O c. P200,000