The controller of Billings 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 $2,800 3,000 February 3,000 4,000 March 3,600 6,000 April 4,500 7,900 May 3,200 5,000 June 5,000 8,000 Determine fixed and variable costs using the high-low method and prepare graph. (SO 1, 3) 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