Total Total Electricity Costs Machine Hours January $1,920 250 February 2,950 340 March 3,320 460 April 4,550 690 May 3,170 430 June 4,890 790 July 4,010 650 August 3,930 560 September 5,020 680 October 4,390 615 November 3,260 340 December 6,150 810What electricity cost does the cost equation estimate for a level of activity of 460 machine hours? (Round answer to 2 decimai places e.g. 1.25.) By what amount does this differ from March's observed cost for 460 machine hours? (Round answer to 2 decimal places e.g. 1.25.)