The controller of Crane Production has collected the following monthly expense data for analyzing the cost 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- and variable-cost components using the high-low method. Fixed-costs Variable-costs $ eTextbook and Media (b) What electricity cost does the cost equation estimate for a level of activity of 460 machine hours? Electricity costs $ By what amount does this differ from March's observed cost for 460 machine hours? Amount differ $(c) What electricity cost does the cost equation estimate for a level of activity of 800 machine hours? Electricity costs $ By what amount does this differ from June's observed cost for 800 machine hours? Amount differ $