8 05 points 0229 23 eBook Exercise 26-20A (Algo) IRR for investment using Excel LO P4 OptiLux is considering investing in an automated manufacturing system. The system requires an initial investment of $4.1 million, has a 20-year life, and will have zero salvage value. If the system is implemented, the company will save $600,000 per year in direct labor costs. The company requires a 12% return from its investments. Using Excel, compute the internal rate of return for the proposed investment. (Round your answer to 2 decimal places.) internal rate of return % References