Question 1: Product and period cost a) In a manufacturing firm, product costs include: all GAAP costs all fixed costs all manufacturing costs all non-manufacturing costs all variable costs period costs include: all variable costs all non-GAAP costs all manufacturing costs all fixed costs -all non-manufacturing costs b) Classify the following items as product or period costs: Rent for the factory building product Rent for the sales office product Depreciation on production equipment product Depreciation on sales office equipment product Production supervisor's salary product Marketing manager's salary product Assembly workers' wages product Materials used in production product Office supplies used in the customer service department product period period period period period period period period period