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 Number of Cavities Filled Total Cost January 300 $5,100 February 500 5,650 March 675 6,600 April 475 5,800 May 525 5,950 June 575 6,350 July 350 5,150 August 325 5,150 September 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 Mountains total cost for filling 600 cavities.