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	$	5,600
February	700		6,000
March	500		4,500
April	425		4,100
May	450		4,500
June	300		3,200
July	375		3,500
August	550		4,900
September	575		5,400

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 500 cavities.