The controller of Sandhill 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 $2,880 3,820 January February 3.273 4,364 March 3,928 6,546 April 4.632 8,619 May 3,491 5.455 June 4,844 8,730 (a1) Determine the variable-cost components using the high-low method. (Round answer to 2 decimal places es 2.25)