The Bradshaw factory gathered the following information on power costs and factory machine usage for the last five months:

Month Factory Machine Hours Power Cost ($)

January 2,000 hours $2,400

February 1,500 hours $2,000

March 2,200 hours $2,600

April 2,500 hours $2,800

May 2,300 hours $2,700

(a) What is the variable portion of power costs per factory machine hour?___________

(b) What is the fixed power cost each month?_____________