The following account balances has been extracted from Jimbob Co.'s general ledger: Direct materials used in production $200,000 Depreciation factory building $10,000 Depreciation factory equipment $50,000 Depreciation sales department automobiles $10,000 Direct wages factory employees $200,000 Sales department salaries and commissions $150,000 Factory managers salary $50,000 Utility costs factory $50,000 Utility costs sales office $20,000 What was the total of manufacturing costs? a $400,000. b $510,000. c $560,000. d $740,000