A county EMS system reports the following monthly data to the County Commission which operates the service. Based on the data, calculate the total fixed cost, average fixed cost, average variable cost, average total cost and marginal cost for successive output levels. If the EMS system is operating at a level of three trips per 8-hour shift, and it wants to determine the resources needed to make another trip, which statistic will it use?

EMS Ambulance Runs	Total Variable Costs	Total Costs
0	0	$1200
1	$1300	$2500
2	$1400	$2600
3	$1500	$2700
4	$1800	$3000
5	$2400	$3900
6	$3600	$4800