Carrying forward the same data... A Solar panel installation on a warehouse costs $10,000 to install. The company will get a refund from the utility company at the end of each year, over the next ten years. Expected Annual savings from reduced energy bill is $2500 per year (same data as above). What is the Internal Rate of Return (IRR) if the company proceed with the project? 9% 20.0% 21.4% 23.5%