E5-5 Determine fixed and variable costs using the high-low method and prepare graph. (LO 1, 2), AP The controller of Hall Industries has collected the following monthly expense data for use in analyzing the cost behavior of maintenance costs. Month Total Maintenance Costs Total Machine Hours January $2,640 3.500 February 3.000 4.000 March 3.600 6.000 April 4.500 7.900 May 3.200 5.000 June 4.620 8.000 Instructions (a) Determine the fixed- and variable-cost components using the high-low method. (b) Prepare a graph showing the behavior of maintenance costs and identify the fixed- and variable- cost elements. Use 2,000-hour increments and $1,000 cost increments