BA II plus the black one

CFA Level I Corporate Finance
#1

After I calculate the NPV and I press the down arrow to get the PB it just switches back to I. I don’t know how it get the PB on the calculator and checked out many tutorials

#2

PB?? What is that?

All you have to do is input your cash flows (CF), then your interest rate. That’s literally all you need to know for calculating NPV.

EDIT: If you’re talking about payback period, you can’t do it on the regular BA II plus.