Apparently the present value factor is 6.4177. I dont know how to get to that number. Can someone show the process, please?

E15-26.Stat eBook B Print Question 4 Correct Mark 15.00 out of 15.00 P Flag question PI Cedar City Public Transportation is considering adding a new bus route. To do so, the entity would be required to purchase a new $600,000 bus, which would have a 10-year life and no salvage value. If the new bus is purchased, Cedar City Public Transportation's managers expect net cash inflows from bus ridership would rise by $91,000 per year for the life of the bus. Cedar City Public Transportation uses a 9 percent required rate of return for evaluating capital projects. a. Compute the profitability index of the bus investment. Note: Round amount to two decimal points (i.e. round 4.555 to 4.56). Support 0.97 b. Should Cedar City Public Transportation buy the new bus? No c. What is the minimum acceptable value for the profitability index for an investment to be acceptable? 1 Check