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Any help is much appreciated!

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 Total Cost 375 $5,300 500 5,850 350 5, 200 600 6, 250 325 5, 150 475 5,700 525 6,100 575 6,300 450 5, 550 July August September Required 1 Required 2 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 Required 1 Required 2 Using these estimates, calculate Mountain's total cost for filling 400 cavities. Estimated Total Cost