Reamer Corporation uses a predetermined overhead rate based on machine-hours to apply manufacturing overhead to jobs. The Corporation has provided the following estimated costs for next year: 3. Direct materials Direct labor Sales commissions Salary of production supervisor Indirect materials Advertising expense Rent on factory equipment 1,000 3,000 S 4,000 $ 2,000 S 400 S 800 S 1,000 Reamer estimates that 500 direct labor-hours and 1,000 machine-hours will be worked during the year. The predetermined overhead rate per hour will be: A) $6.80 per machine-hour B) S6.00 per machine-hour C) $3.00 per machine-hour D) $3.40 per machine-hour