The following information is available for Mazoon company's electricity cost for operating its heavy machinery over the last quarter of the year 2020. Month Machine hours Electricity cost $ 11,900 1,800 September 1,300 $ 5.200 October November 4,800 $ 15,200 December 6,500 $ 19.200 Using the high-low method, the estimated variable cost per machine hour for total cost of electricity is approximately: a $2.95 b. $2.69 Oc None of the given answers Od $2.86 e$0.37