Enzo the management accountant at JVC Ltd, is examining the behaviour of quarterly maintenance costs for budgeting purposes. Enzo collects the following data on machine-hours worked and maintenance costs for the past eight quarters: Required 1. Use the high-low method to calculate the function, relating machine 40 MARKS hours and maintenance costs. 2. Use the simple regression method to calculate the cost function, 30 MARKS relating machine hours and maintenance costs. 3. Using: (a) the regression equation and (b) the high-low equation, 30 MARKS what is the increase in maintenance cost for each 1000 hours use on machine hours