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Oman Marble Company has two processing departments, Cutting and Polishing. The company uses a multiple predetermined overhead rate in each processing department under job-order costing system. The Cutting Department's predetermined overhead rate is based on machine-hours and the Polishing Department's predetermined overhead rate is based on direct labor cost. At the beginning of the current period, the company records show the following estimated information: Polishing 40 Direct Labor cost per hour Direct labor-hours Machine-hours Total fixed manufacturing overhead cost Variable manufacturing overhead per machine-hour Variable manufacturing overhead per direct labor-hour Cutting $ 20 5,000 20,000 $ 100,000 $ 5 10,000 5,000 $ 40,000 $ 6 enthal in der number 3122 The job cost sheet During the current period the company started and finished a job order number 3122. The job cost sheet shows the following data for this job: Job3122 Cutting 90 Polishing 20 Machine-hours 30 60 Direct labor-hours $ 250 Direct materials $ 1.200 $ 700 $ 5,000 Direct labor cost The total job cost for Job 3122 is closest to: O a $ 7.150 b. None of the given answers Oc$ 8,650 d. $ 9.300