MC Qu.5 Use the payback decision rule to evaluate this project; should i Suppose you firm is considering investing in a project with the cash flows shown below, that the required rate of return on projects of this risk class is 11 percent, and that the maximum allowable payback and discounted payback statistic for the project are 2 and 3 years respectively. MC Qu.5 Use the payback decision rule to evaluate this project; should i Suppose you firm is considering investing in a project with the cash flows shown below, that the required rate of return on projects of this risk class is 11 percent, and that the maximum allowable payback and discounted payback statistic for the project are 2 and 3 years respectively