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A. fixed, increasing B. variable, decreasing C. fixed, decreasing D. variable, increasing 16. Which costs will change with a decrease in activity within the relevant range? A. Total fixed costs and total variable cost. B. Unit variable cost and unit fixed cost. C. Unit fixed cost and total fixed cost. D. Unit fixed costs and total variable cost. 17. Which of the following is correct concerning reactions to INCREASES in activity? A. Choice A B. Choice D C. Choice B D. Choice C 18. Fixed costs expressed on a per unit basis: A. increase with increases in activity. B. are not affected by activity. C. should be ignored in making decisions since they cannot change. D. decrease with increases in activity. 19. When the level of activity decreases within the relevant range, the fixed cost per unit will: A. decrease. B. remain the same. C. The effect cannot be predicted. D. increase. 20. Which of the following production costs, if expressed on a per unit basis, would be most likely to change significantly as the production level varies? A. Fixed manufacturing overhead. B. Direct materials. C. Direct labor. D. Variable costs