Mountain Dental Services is a specialized dental practice whose only service is filling cavities. Mountain has recorded the following for the past nine months Month January February March April May June Number of Cavities Filled 625 525 475 375 675 500 325 700 450 Total Cost $6,350 5,950 5,650 5,350 6,500 5,700 5,150 6,350 5,450 August September Required 1. Use the high-low method to estimate total fixed cost and variable cost per cavity filled. (Round your answers to 2 decimal places.) Fixed Cost Variable Cost per Unit 2. Using these estimates, calculate Mountain's total cost for filling 550 cavities Estimated Total Cost