Which of the following costs would be included in the cost of a manufactured product according to

Question:

Which of the following costs would be included in the cost of a manufactured product according to the variable costing concept?
(a) Rent on factory building,
(b) Direct materials,
(c) Property taxes on factory building,
(d) Electricity purchased to operate factory equipment,
(e) Salary of factory supervisor,
(f) Depreciation on factory building,
(g) Direct labor?