Valley Dental Services is a specialized dental practice whose only service is filling cavities. Valley has recorded the following for the past nine months. Required: Use the high-low method to estimate total fixed cost and variable cost per cavity filled. (Round your variable cost to 2 decimal places. Omit the "$" sign in your response.) Using the above estimates, calculate Valley's total cost for filling 500 cavities. (Omit the "$" sign in your response.)