Simple regression results from the data of Adriana Corporation (Exercise 5-33) are as follows:

                   

Required
Estimate overhead if the company expects the plant to operate at a monthly average of 9,000 machine-hours next year.

Data From Exercise 5-33:

Adriana Corporation manufactures football equipment. In planning for next year, the managers want to understand the relation between activity and overhead costs. Discussions with the plant supervisor suggest that overhead seems to vary with labor-hours, machine-hours, or both. The following data were collected from last year’s operations:

                                

Required
a. Use the high-low method to estimate the fixed and variable portions of overhead costs based on machine-hours.
b. Managers expect the plant to operate at a monthly average of 7,500 machine-hours next year. What are the estimated monthly overhead costs, assuming no inflation?