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: Month January February March April May June July August Number of Cavities Filled 300 600 575 450 525 550 625 325 400 Total Cost $5,000 6,150 6,350 5,400 6,150 6,050 6,300 5,200 5,200 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 425 cavities Estimated Total Cost