Canyon Dental Services is a specialized dental practice whose only service is filling cavities. Canyon has recorded the following for the past nine months: Month January February March April May June July August September Required: Number of Cavities Filled 650 500 625 425 600 450 575 700 350 Total Cost $ 6,200 5,750 5,550 5,550 5,850 5, 150 6,150 6,100 5,050 1. Use the high-low method to estimate total fixed cost and variable cost per cavity filled. 2. Using these estimates, calculate Canyon's total cost for filling 400 cavities.