3.9 Joints eBook i-iint Print References Mountain Dental Services is a specialized dental practice whose only service is filling cavities. Mountain has recorded the following for the past nine months: Number of Cavities Month Filled Total Cost January 466 $5,256 February 566 5,856 March 675 6, 566 April 525 5, 656 May 766 5,966 June 425 5, 866 July 666 5, 756 August 366 5,466 September 456 5,256 l Required: 1. Use the high-low method to estimate total fixed cost and variable cost per cavity filled. 2. Using these estimates, calculate Mountain's total cost for filling 800 cavities. Complete this question by entering your answers in the tabs below. Use the high-low method to estimate total fixed cost and variable cost per cavity filled. (Round your Variable cost per unit to 2 decimal places.) Fixed Cost Variable Cost per cavity filled