Exercise 3-36 (Algo) CVP and Margin of Safety (LO 3-1, 2) Bristol Car Service offers airport service in a mid-size city. Bristol charges $58 per trip to or from the airport. The variable cost for a vip totals $38, for fuel, driver, and so on. The monthiy fixed cost for Bristol Rainbow Tours is $6.400. Required: a. How many trips must Bristol sell every month to break even? b. Bristoi's owner believes that 332 trips is a reasonable forecast of the average monthly demand. What is the margit of safety in terms of the number of airport trips