Robin Company has the following balances for the current month: Direct materials used Direct labor Sales salaries $ $ $ Depreciation on factory $ Indirect labor $ Production manager's salary $ Marketing costs $ Factory lease $ 15,000 20,000 12,000 2,000 9,000 11,000 10,000 4,000 What is Robin's total manufacturing overhead? Refer to Robin Company. What is Robin's prime cost? Refer to Robin Company. What is Robin's conversion cost?