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Rupe Company has two departments: Machining and Assembly. The following estimates are for the coming year: ut of Machining 30,000 150,000 Assembly. 40,000 200,000 Direct labor hours Machine hours Manufacturing overhead costs $600,000 $800,000 A single predetermined manufacturing cost driver rate based on total plant direct labor hours is: Select one: A. $10 per direct labor hour. B. $20 per direct labor hour. C. $40 per direct labor hour.. D. $ 4 per direct labor hour. SA_ ENG 11:51 AM