ents Materials 34 Resources Assume you need to replace your roof, which will cost $75,000 and last for 25 years. You are also considering installing a solar roof, which will cost $195,000 and last 25 years. The solar roof comes with a 30% tax credit and will save you $5,400/year in electricity. What is the internal rate of return (IRR) if you spend more money on the solar roof? O -0.085% O-2.65% O 0.93% O-10.28% O 7.26% E