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The controller of Wildhorse Industries has collected the following monthly expense data for use in analyzing the cost behavior of maintenance costs. Total Total Maintenance Costs Machine Month Hours January $2.925 3,880 February 3.324 4,432 March 3.989 6.648 April 4,986 8,753 May 3.546 5,540 June 5.420 8,870 (a1) Determine the variable-cost components using the high-low method. (Round answer to 2 decimal places e.g. 2.25.) Variable cost per machine hour $ eTextbook and Media (a2) Determine the fixed cost components using the high-low method. Fixed costs $