A company's planned activity level for next year is expected to be 100,000 machine hours. At this level of activity, the company budgeted the following manufacturing overhead costs: Variable costs= Indirect materials ($140,000), Indirect labor ($200,000), and Factory supplies ($20,000); Fixed costs= Depreciation ($60,000), Taxes ($10,000), and Supervision ($50,000); A flexible budget prepared at the 80,000 machine hours level of activity would show total manufacturing overhead costs of $408,000. How do you get this answer ($408,000)?