Exercise 2-9 (Part Level Submission) Stratton, Inc., has collected the following information on its cost of electricity: January February March April May June July August September October November December Machine Hours 510 540 360 450 660 690 340 520 240 750 840 600 Total Electricity Costs $240 $300 $205 $215 $290 $300 $180 $260 $120 $340 $360 $320 (a) Using the high-low method, compute the variable cost of electricity per machine hour. (Round unit cost to 2 decimal places, e.g. 52.75.) Variable cost $ Click if you would like to Show Work for this questio Open Show Work per machine hour