Castle Incorporated has the following information about three costs, A, B, and C: Required: Indicate whether these costs are variable, fixed, or mixed. Canyon Dental Services is a specialized dental practice whose only service is filling cavities. Canyon has recorded the following for the past nine months: Required: 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 700 cavities. Use the high-low method to estimate total fixed cost and variable cost per cavity filled. Note: Round your Variable cost per unit to 2 decimal places. Using these estimates, calculate Canyon's total cost for filling 700 cavities