0/1 Question 4 of 6 The controller of Sandhill Industries has collected the following monthly expense data for use in analyzing the cost behavior of maintenance costs. Total Maintenance Costs Month January February March April May June $2,880 3,273 3,928 4,632 3.491 4,844 Total Machine Hours 3,820 4,364 6,546 8,619 5,455 8.730 (a1) Your answer is incorrect. Determine the variable-cost components using the high-low method. (Round answer to 2 decimal places eg. 2.25.) Variable cost per machine hour $