Hello @Mind-Brain !.
You are absolutely right 
. I completely forgot, that in set members, you could select which variable to make visible, to select āTotalā. I put the result in case someone can use it:
What I donāt know, is why the Total, of the structure, is not displayed to me in the UI and neither the text that I put as an example, as if something was not working, I donāt understand why.
Thank you very much for your contributions, I am learning a lot and taking giant steps in these structures with arrays.
A greeting.