Fixed costs expressed on a per unit basis:.a. are not affected by activity. b. should be ignored in making decisions since they cannot change. c. decrease with increases in activity. d. increase with increases in activity.

d. increase with increases in activity.

Explanation:

Fixed cost usually remains the same over a range of activity level. However, when fixed cost is given in per unit.

It means that the cost increases as the number of units produced increases and since the number of units produced is directly proportional to the activity level, fixed costs expressed on a per unit basis increase with increases in activity.

answer; burned it;

answer; sales of books;