Electrical costs at one of Kantola Corporation's factories are listed below: Machine Hours Electrical Cost February 3.570 $36,405 March 3,580 $36,493 April 3,553 $36,302 May 3,627 $36,833 June 3,625 $36,800 July 3,565 $36,366 August 3,548 $36,237 September 3,542 $36.213 October 3,593 $36,577 Management believes that electrical cost is a mixed cost that depends on machine-hours. Using the high-low method estimate the variable and fixed components of this cost. Those estimates are closest to: O A 50.14 per machine-hour: 536,336 per month OB. 510.19 per machine-hour; $36,470 per month OC 57.48 per machine-hour 59.708 per month OD. 57.29 per machine-hour: 510.392 per month