Need some help with the following question, thanks!

The controller of Crane Production has collected the following monthly cost data for analyzing the behavior of electricity costs. Total Total Electricity Costs Machine Hours January $2,330 220 February 3.030 380 March 3,560 460 April 4,630 685 May 3,240 430 June 4,920 800 July 4,060 645 August 3,870 530 September 5.030 675 October 4,380 600 November 3,210 380 December 6,530 820 (a) Determine the fixed costs and unit variable costs using the high-low method. Total fixed costs $ Variable cost per machine hour $