A company is considering installing solar panels on its roof. The project will cost $663 thousand if it is installed now. It will save $76 thousand of energy cost each year. The life span of the panels is 20 years. If the company waits a year to install the panels, the cost of installation will decrease by $20 thousand, but everything else will remain the same (e.g., life span, energy bills saving). The opportunity cost of capital is 6.5% per year. The net present value of the solution that the firm should adopt is $ thousand. [Hints/Example)