Fountainhead produces agricultural irrigation equipment. During a year, the amount of overhead costs on a per-month basis varies in relation to the machine hours used in a given year. The low for the past year was 4,590 hours, and the expense associated was $113,670. The high for the period was 6,900 hours, and the associated expense was $150,117. During the low month, the $113,670 in overhead costs consisted of indirect materials of $68,850 (a variable expense), rent of $34,250 (a fixed expense), and maintenance costs of $10,570 (a mixed expense).

1.	Given the breakdown of expenses in the low period, what are the estimated costs for (a) indirect materials, (b) rent, and (c) maintenance during the highperiod?
2.	What is the cost function for maintenance costs?
3.	What amount of maintenance costs would be expected with 7,600 machine hours of work?
4.	What would be the total overhead costs at 7,600 machine hours?

Please show the calculations.