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	400	$5,250
February	500	5,850
March	675	6,500
April	525	5,650
May	700	5,900
June	425	5,800
July	600	5,750
August	300	5,400
September	450	5,250

Required:

1. Use the high-low method to estimate total fixed cost and variable cost per cavity filled.

Fixed cost = ?

Variable cost per cavity filled = ?

2. Using these estimates, calculate Mountains total cost for filling 800 cavities.

Estimated total cost = ?