Trimming Removing dots in an else if function

Hi.I have an if elseif fuction and trying to remove dots (.) at the end of my string

As you see on the example below, there are dots (.) in the elseif fuctions that I'm trying to get rid of (e.g.Don't pay.). I know I can use different approaches but I would like to trim it in the same formula function.

if [field1]="11" then "GO PAY"

ELSEIF [field1]="2" then "Don't Pay."

ELSEIF [field2]="1232" then " leave 553."

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Thanks