E5-5 Estimating Cost Behavior Using High-Low Method [LO 5-3) 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 Filed Total Cost January 56,350 February 6.250 6.400 April 6.250 May 6.150 August 5,800 5,000 September 400 5.400 Required: 1. Use the high-low method to estimate total foxed cost and variable cost per cavily fried (Round your answers to 2 decimal places.) Fixed Cost Variable Cost per Unit 2. Using these estimates, calculate Mountain's total cost for filling 450 cavities Estimated Total Cost