The overhead absorption rate used to allocate manufacturing overhead is calculated by: Select one: O a. dividing the total estimated quantity of the cost driver by the total estimated manufacturing overhead costs O b. dividing the total actual manufacturing overhead costs by the total estimated quantity of the cost driver O c. dividing the total estimated manufacturing overhead by the total actual quantity of the cost driver O d. dividing the total estimated manufacturing overhead costs by the total estimated quantity of the allocation base Clear my choice