I am trying to set up the formula for lookup using the assist where I can
fill in the function arguments:

In lookup value, I enter B2 and the correct value is displayed.
In lookup vector, I enter something like "A","B" - the value displayed is
INVALID
In the result vector, I want 1 to display if A is matched and 2 to display
if B is matched. I have entered 1,2 and it shows as "1,2"

What am I doing wrong here?

Thanks,
Barb Reinhardt