Sivret Corporation uses a job-order costing system with a single plantwide predetermined overhead rate based on machine-hours. The company based its predetermined overhead rate for the current year on the following data: Total machine-hours Total fixed manufacturing overhead cost Variable manufacturing overhead per machine-hour 80,000 $624,000 $ 3.10 Recently. Job M598 was completed with the following characteristics: Number of units in the job Total machine-hours Direct materials Direct labor cost 60 300 $ 645 $9,000