The wind turbines require an investment of $856,500, while the biofuel equipment requires an investment of $1,398,060. No residual value is expected from either project Present Value of an Annuitv of $1 at Compound Interest answers to three decimal places and internal rate of return to the nearest whole percent. 3. The net present value, present value index, and internal rate of return all indicate that the is/are a better financial opportunity compared to the , although both investments meet the minimum return criterion of 10%