When calculating the total amount of manufacturing overhead to allocate to a particular​ job, the company would multiply each departmental overhead rate by​ ________ and then​ ________ together the allocated amounts from each department.

a. the actual amount of the departmental allocation based used by the​ job; multiply

b. the actual amount of the plantwide allocation based used by the​ job; add

c. the actual amount of the departmental allocation based used by the​ job; add

d. the actual amount of the plantwide allocation based used by the​ job; multiply?