Assume that the project is expected to return monetary benefits of $20,000 the first year, and increasing benefits of $5,000 until the end of project life (year 1 = $20,000, year 2 = $25,000, year 3 = $30,000). The project also has one-time costs of $30,000, and fixed recurring costs of $10,000 until the end of project life. The project has a discount rate of 8% and a three-year time horizon.

Calculate overall overall return on investment (ROI) of the project at the end of project life.