Please solve the attached question and show method for solution.

Happy, Inc., has collected the following information on its cost of electricity: Machine HoursTotal Electricity Costs January February March April May June July August September October November December 520 540 350 460 680 710 330 540 260 740 860 600 $250 $290 $190 $210 $270 $350 $160 $250 $132 $330 $360 $330 Using the high-low method, compute the variable cost of electricity per machine hour. (Roun unit cost to 2 decimal places, e.g. 52.75.) Variable cost per machine hour