Answer:
step-wise fixed cost
Explanation:
A step cost is a cost that remain the same with a range of activities but has the tendency to rise significantly when activity exceeds the normal range.
For example, For a school that pays $10,000 as rent for a classroom of 20-seater capacity, the rent would be fixed as long as the number of students is within 1 to 20, when the number of students exceed 20, then the school owner will need to get a bigger classroom and that will cost more.
So the rent becomes an example of stepped-fixed cost