Exercise 2-9 (Part Level Submission) Pharoah, Inc., has collected the following information on its cost of electricity: Machine Hours Total Electricity Costs 510 $250 January February 540 $290 March 380 $200 April 460 $200 May 670 $300 700 June $310 July 330 $160 540 August $280 September 210 $128 October 750 $310 November 850 $320 December 600 $290 (a) X Your answer is incorrect. Try again. 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.) 30 Variable cost $ per machine hour