Thanks for taking the time to solve my issue, as I said before I am not a specialist with expressions, maybe I can help someone else with an easier alternative.
Once you filtered on the total in an chose 0, you go back to creating measure and select your alternate state, chose the table + total in and you can simply click on 'set expression' and the measure I wanted magically appears.
This is also very helpful with dates, etc.
Greetings from Luxembourg
Since it worked for me, hopefully someone else gets the 'aha' moment as well.