Answer:
correct option is d. rental costs of $10,000 per month plus $0.30 per machine hour of use
Explanation:
solution
The combined cost is one in which the factor is variable and constant.
Sometimes, even the total cost is difficult to separate.
The chosen option also includes a fixed cost that costs $ 5,000 per month.
The cost per hour of the machine increases 0.30 per hour.
This is variable because the entire machine depends on the number of hours used.
The other three are completely variable, such as salary, and are not deductible or cost of electricity.
