The accounts of the Maintenance Shop have documented the following maintenance hours and maintenance costs over a six month period.

Month Maintenanace hours Total maintenance cost

January 100 $450

February 200 $750

March 300 $1,050

April 500 $1,650

May 400 $1,300

June 450 $1,150

Calculate the variable cost per unit and fixed cost using the high-low method

Calculate the variable cost per unit and fixed cost using regression analysis

Express the cost functions using both menthods

Calculate the total cost of 550 maintenance hours, using both methods