OT 6 Machine Hours Total Electricity Costs January 510 $230 February 540 $300 March 340 $200 April 430 $220 May 670 $290 June 730 $350 July 320 $170 August 530 $260 September 250 $120 October 730 $350 November 850 $360 December 600 $340 - / 20 (a) Identify the high and low points. High point Low point Machine Hours $ +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 $ eTextbook and Media per machine hour