Red Runner's Work in Process Inventory account has a beginning balance of $50,000 and an ending balance of $40,000. Direct materials used are $70,000 and direct labor used totals $35,000. Cost of goods sold totals $135,000. Manufacturing overhead applied is $20,000. How much is cost of goods manufactured? O a. $115,000 b. $135,000 c. $125,000 d. $145,000