Performance reports often compare current period results with Select one: O a. Planned (budgeted) performance. O b. Neither a norb. c. Performance in a prior period. d. Both a and b. Which of the following does not change when the level of business activity changes? Select one: O a. Total variable costs. O b. Total direct material costs. O c. Fixed cost per unit O d. Total fixed costs. Variable cost per unit Select one: a. decreases when the number of units produced decreases. b. increases when the number of units produced increases. c. does not change when the number of units produced increases. d. decreases when the number of units produced increases