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	625	$6,350
February	525	5,950
March	475	5,650
April	375	5,350
May	675	6,500
June	500	5,700
July	325	5,150
August	700	6,350
September	450	5,450

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.) 2. Using these estimates, calculate Mountains total cost for filling 550 cavities.