I need help with question C

The controller of Wildhorse Industries has collected the following monthly cost data for analyzing the behaviour of electricity costs. Total Total Electricity Costs Machine Hours January $ 2,570 260 February 3,060 390 March 3,550 500 April 4,760 690 May 3,220 490 June 4,910 800 July 4,120 650 August 3,800 540 September 5,080 660 October 4.210 625 November 3.290 390 December 6,300 820(a) Your answer is correct. Calculate the unit variable costs and fixed costs using regression analysis for this mixed cost. Present your solution in the form of a cost formula. (Round answers to 2 decimal places, e.g. 2.45.) Intercept 818.11 Slope 5.73 The cost equation is: $ 818.11 + $ 5.73 units produced = Total cost eTextbook and Media Attempts: 1 of 3 used Using multiple attempts will impact your score. 40% score reduction after attempt 2(c) What electricity cost does the cost formula estimate for a level of activity of 500 machine hours? (Round answer to O decimal places, e.g. 1,234.) Electricity cost $ By what amount does this differ from March's observed cost for 500 machine hours? (Round answer to O decimal places, e.g. 1,234.) Difference eTextbook and Media Save for Later Attempts: 0 of 3 used Submit Answer Using multiple attempts will impact your score. 40% score reduction after attempt 2