Discretionary cost: cost that results from periodic management decisions.
Differential: future cost that changes as a result of a future decision.
Non-Controllable cost: cost over which one individual does not have power and influence.
Indirect cost: cost that is not physically traceable to any single cost object.
Jawaban: a. Discretionary cost
[1] Mulligan, E. and Stone, G. (1997). Accounting and financial reporting in life and health insurance companies. Atlanta, Ga.: Life Management Institute, LOMA.