Refer to the following data. Direct material used Selling costs Indirect labour Administrative costs Depreciation on factory equipment Direct labour Overtime premiums paid Indirect materials $120,000 $ 10,000 $ 12,000 $ 15,000 $ 65,000 $ 34,000 $ 12,000 $ 25,000 The conversion costs are: Select one: O a. $ 34,000. b. $150,000. c. $123,000. d. $136,000 e. $148,000