Use the following data for the next 2 questions. Milano Company has an average overhead cost per hour of $10.50 at 3,500 machine hours, and at 3,000 hours it is $11.25. The company managers wish to estimate the overhead cost function. 30. What is the variable overhead cost per machine hour? a. $1.00 b. $2.00 c. S6.00 d. $8.00 31. What is the fixed overhead cost? a. $15,750 b. $36,750 c. $21,000 d. $18,000