Help 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 July August September Number of Cavities Filled. Total Cost 300 $5,100 500 5,650 675 6,600 475 5,800 525 5,950 575 6,356 350 5, 150 325 5,150 550 6,100 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 600 cavities