QUESTION 16 When the activity level increases, what should happen with respect to fixed and variable costs in total: Fixed costs increase, variable costs decrease Fixed costs do not change, variable costs decrease Fixed costs do not change, variable costs increase Fixed costs decrease, variable costs increase QUESTION 17 Commissions paid to automobile salespersons would be a: Variable cost and product cost. Fixed cost and period cost. Variable cost and period cost. Fixed cost and product cost. Overhead and mixed cost