DO NOT BOTHER ANSWERING IF YOU DON"T USE AN INTERNAL RATE OF RETURN APPROACH!

I have had many Present worth/value answer methods but that is not what I am asking.

Fabco, Inc., is considering purchasing flow valves that will reduce annual operating costs by $10,000 per year for the next 12 years. Fabco's MARR is 7 percent/year. Using an internal rate of return approach, determine the maximum amount Fabco should be willing to pay for the valves. Fabco, Inc., is considering purchasing flow valves that will reduce annual operating costs by $10,000 per year for the next 12 years. Fabco's MARR is 7 percent/year. Using an internal rate of return approach, determine the maximum amount Fabco should be willing to pay for the valves