predetermined overhead rate for the current year on total fixed manufacturing overhead cost of $440,000, variable manufacturing overhead of $2 20 per machine-hour, and Valvano Corporation uses a job-order costing system with a single plantwide predetermined overhead rate based on machine-hours The company based its 50,000 machine-hours. The estimated total anufacturing overhead is closest to. A) $440,000 B) $550,000 C) $440,002 S110,000