Ivanhoe Co.gathered the following information on power costs and factory machine usage for the last six months: Factory Machine Hours Month Power Cost January $25,240 14,300 February 31,612 18.400 March 29,820 17,200 April 23,160 13,600 May 20,740 12,000 June 17,700 9,000 Using the high-low method of analyzing costs, answer the following questions and show computations to support your answers. (a) What is the estimated variable portion of power costs per factory machine hour? (Round answer to 2 decimal places, e.g. 15.25.) Variable power costs $ per factory machine hour Save for Later Attempts: 0 of 1 used Submit