OptiLux is considering investing in an automated manufacturing system. The system requires an initial investment of $5.0 million, has a 20-year life, and will have zero salvage value. If the system is implemented, the company will save $620,000 per year in direct labor costs. The company requires a 10% return from its investments.

what is irr?

please include how you came up with the numbers to put in the equation clearly. thanks