The controller of Sheridan 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 $2,735 3,620 February 3,108 4,144 March 3,730 6,216 April 4,662 8,184 May 3,315 5,180 June 4,832 8,280 (a1) New attempt is in progress. Some of the new entries may impact the last attempt grading. Your answer is incorrect. 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