Pus When assigning indirect costs to products or services, using the activity-proportion method results in O A lower dollar amount of costs allocated than the activity rate method. A higher dollar amount of costs allocated than the activity rate method. The same dollar amount of costs allocated as the activity rate method. A higher or lower dollar amount of costs allocated than the activity rate method depending on the type of product manufactured. Which of the following costs change when the level of activity changes (for example the number of customers served)? total fixed costs total variable costs O per-unit fixed costs both per unit fixed costs and total variable costs change when the level of business activity changes Which of the following is a product cost? advertising expenses administrative salaries manufacturing overhead O sales commissions