Question 1 David, the management accountant of ABC is analysing the cost behaviour of maintaining machines for the business. The following information for the machine working hours and the maintenance costs for the past 12 months. Month Machine Hours Maintenance cost January February March April May 90,000.00 185,000.00 110,000.00 220,000.00 100,000.00 200,000.00 120,000.00 240,000.00 85,000.00 170,000.00 105,000.00 215,000.00 June July 95,000.00 195,000.00 115,000.00 235,000.00 August MEF 121 Mangal Accounting September 95,000.00 190,000.00 October 115,000.00 225,000.00 November 105,000.00 180,000.00 December 125,000.00 250,000.00 a) Estimate the cost function by using the high-low method. b) If David estimates that ABC corporation will be using 90000 machine hours in the following month of January, calculate the repair cost for that month by using the function obtained in (a)