Refer to the present worth formula for a geometric gradient to calculate the present worth of annual costs. ?The City of Boston is considering adding new buses for its current mass-transit system that links from the Hartsfield International Airport to major city destinations on a nonstop basis. The total investment package is worth $5 million and expected to last 10 years with a $800,000 salvage value. The annual operating and maintenance costs for buses would be $1.7 million during the first year, and will grow by 4% each year over the previous year thereafter. If the system is used for 700,000 trips per year, what would be the fair price to charge per trip to have a profitability index of 1? Assume that the City of Boston uses a 3% interest rate for city-sponsored projects.