Ecola Company uses a job order costing system. Manufacturing overhead is applied on the basis of direct labor cost. Total manufacturing overhead was estimated to be $120,000 for the year; direct labor was estimated to total $150,000. Raw Materials Inventory Work in Process Inventory Finished Goods Inventory (1/1) $ 12,000 $ 29,000 $ 41,000 (12/31) $ 10,000 $ 22,000 $ 32,000 The following transactions have occurred during the year. $ 100,000 Raw materials purchases Direct materials used Direct labor Indirect materials used Indirect labor Factory equipment depreciation Factory rent Factory utilities Other factory costs $ 135,000 $ 16.000 $ 19.000 $ 28.000 $ 15.000 $ 11,500 $ 8,500 a. Calculate the predetermined overhead rate. b. Calculate cost of goods manufactured. c. Calculate the over or under-applied overhead. d. Calculate adjusted cost of goods sold