All are examples of a prime cost EXCEPT: O a. The salary of the production manager in a factory. O b. All the examples given are prime costs Oc. The salary of a carpenter in a furniture factory. O d. The carton boxes for packing milk. O e. The salary of the electrician who installs the power board inside a tv. Budgets are a primary tool of which management function? O a. Mentoring b. Planning O c. Controlling d. None of the given answers e. Decision making