ABC Company's Total Overhead Costs at Various Levels of Activity

ABC Company's total overhead costs at various levels of activity are presented below:

Assume that the overhead costs above consist of utilities, supervisory salaries, and maintenance. At the 50,000-machine-hour level of activity, these costs are presented below:

The company wants to break down the maintenance cost into its basic variable and fixed cost elements.

Required:

a) Estimate the maintenance cost for June.
b) Use the high-low method to estimate the cost formula for maintenance cost.
c) Estimate the total overhead cost at an activity level of 55,000 machine hours, using the separate estimates you obtained for its components.
d) Estimate the total overhead cost at an activity level of 55,000 machine hours, independent of the separate estimates you obtained for its components.