Bristol Car Service offers airport service in a misty Bristol charges $0 per trip to or from the airport. The variable cost for a trip totais 522. for driver, and so on. The monthly fxed cost for Bristol Rainbow Tours is $6.660 Required: How many trip mus Brise every month to break even? werves the 199 tri satile lowest of the average and what is the main of safety in terms of the number of port? we