Overnight Trucking recently purchased a new truck costing $150,800. The firm financed this purchase at 8.6 percent interest with monthly payments of $2,100. How many years will it take the firm to pay off this debt? A. 7.04 years B. 7.22 years C. 8.10 years D. 8.23 years E. 8.44 years

I want to use my financial calculator to solve this, but for some reason I am not getting the right answer.

I did 8.6%/12 = .00717= I/y

PV= -150800

PMT=2100

Fv=0

I get N= 71.997

I think I'm messing up on the rate. How do I do this in the financial calculator correctly?