Identify whether each of the following costs should be classified as product costs or period costs.

(a)		Period Costs or Product Costs		Manufacturing overhead.
(b)		Period Costs or Product Costs		Selling expenses.
(c)		Period Costs or Product Costs		Administrative expenses.
(d)		Period Costs or Product Costs		Advertising expenses.
(e)		Period Costs or Product Costs		Direct labor.
(f)		Period Costs or Product Costs		Direct materials.