Font Time left 1:00:02 x fox C 8-Oct When calculating the predetermined manufacturing overhead rate, what is the correct basis of calculation? O a. Estimated overhead costs divided by the estimated amount of the cost driver or allocation base O b. Actual overhead costs of the prior year divided by the actual amount of the cost driver or allocation base O c. Estimated amount of the cost driver divided by the estimated total overhead costs Od. Estimated overhead costs divided by the number of days in a year Next page 31-O