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Kelsh Company uses a predetermined overhead rate based on machine hours to apply manufacturing overhead to jobs. The company has provided the following estimated costs for next year: Direct materials Direct labour Sales commissions Salary of production supervisor Indirect materials Advertising expenses Rent on factory equipment $10,000 30,000 40,000 20,000 4,000 8,000 10,000 Kelsh estimates that 5,000 direct labour hours and 10,000 machine hours will be worked during the year. What will be the predetermined overhead rate per hour? Multiple Choice $8.20. $6.40. O (0) $3.40. $6.80 a