Project Evaluation

Your firm is contemplating the purchase of a new $485,000 computer-based order entry system. The system will be depreciated straight-line to zero over its five-year life. It will be worth $35,000 at the end of that time. You will save $140,000 before taxes per year in order processing costs, and you will be able to reduce working capital by $60,000 (this is a one-time reduction). If the tax rate is 24 percent, what is the IRR for this project?

I need second part answered:

In the previous problem, suppose your required return on the project is 11 percent and your pretax cost savings are $150,000 per year. Will you accept the project? What if the pretax cost savings are $100,000 per year? At what level of pretax cost savings would you be indifferent between accepting the project and not accepting it?

PLEASE DON'T DO THE RESOLVATION IN EXCEL.