Canyon Dental Services is a specialized dental practice whose only service is filling cavities. Canyon 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 Canyons total cost for filling 500 cavities.