If I am going to Starbucks to buy a coffee, do I use a debit card or credit card? Why?

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?