Shirley Maze has decided to start Shirley Cleaning, a residential housecleaning service company. She is able to rent cleaning equipment at a cost of $570 per month. Labor costs are expected to be $49 per house cleaned and supplies are expected to cost $4 per house.

Required

a. Determine the total expected cost of equipment rental and the expected cost of equipment rental per house cleaned, assuming that Shirley Cleaning cleans 10, 20, or 30 houses during one month. Is the cost of equipment a fixed or a variable cost?

b. Determine the total expected cost of labor and the expected cost of labor per house cleaned, assuming that Shirley Cleaning cleans 10, 20, or 30 houses during one month. Is the cost of labor a fixed or a variable cost?

c. Determine the total expected cost of supplies and the expected cost of supplies per house cleaned, assuming that Shirley Cleaning cleans 10, 20, or 30 houses during one month. Is the cost of supplies a fixed or a variable cost?

d. Determine the total expected cost of cleaning houses, assuming that Shirley Cleaning cleans 10, 20, or 30 houses during one month.

e. Determine the expected cost per house, assuming that Shirley Cleaning cleans 10, 20, or 30 houses during one month. Why does the cost per unit decrease as the number of houses increases?

f. If Ms. Maze tells you that she prices her services at 25% above cost, would you assume that she means average or actual cost? Why?