Please tell me how you are calculating the 9% rate

Swiss imports can acquire a $520,000 machine now that will benefit the firm over the next 5 years. A newly hired staff assistant correctly computed the net present value to be $106,290 by using a 9% hurdle rate. On the basis of this information, the machine was expected to produce annual cash operating savings of approximately: Multiple Choice $139,074. $161,000. $216,673. $626,290. None of the answers is correct