Please anser using formaulas and not using EXCEL. Thank you

Your firm is contemplating the purchase of a new $600,000 computer-based order entry system. The system will be depreciated straight-line to zero over its five-year life. It will be worth $64,000 at the end of that time. You will save $230,000 before taxes per year in order processing costs, and you will be able to reduce working capital by $79,000 (this is a one-time reduction). If the tax rate is 30 percent, what is the IRR for this project? (Do not round intermediate calculations. Enter your answer as a percent rounded to2 decimal places, e.g., 32.16.) IRR