Hi, I am having difficultiescalculating the ROR and finding what I need to divide. How would I calculate this? Do I need to use the graphs, I know the equation is (net cash inflow - expense = income from asset) then I have to find the average annual operating income from asset / initial investment = accounting rate of return.

Water World is considering purchasing a water park in Miami, Florida, for $1,900,000. The new facility will generate annual net cash inflows of $490,000 for eight years. Engineers estimate that the facility will remain useful for eight years and have no residual value. The company uses straight-line depreciation. Its owners want payback in less than five years and an ARR of 12% or more. Management uses a 10% hurdle rate on investments of this nature. (Click the icon to view the present value annuity table.) (Click the icon to view the present value table.) (Click the icon to view the future value annuity table.) (Click the icon to view the future value table.) Read the requirements Requirement 1. Compute the payback period, the ARR, the NPV, and the approximate IRR of this investment. (If you use the tables to compute the IRR, answer with the closest interest rate shown in the tables.) (Round the payback period to one decimal place.) The payback period is 3.9 years. (Round the percentage to the nearest tenth percent.) The ARR (accounting rate of return) is %