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 Filled 300 500 550 700 475 425 350 575 400 Month January February March Total Cost $5,200 5,650 6,000 6,400 5,850 5,400 5,200 6,200 5,350 May June LI 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 450 cavities Estimated Total Cost