Resetting multiple variables upon retrying

Dear community,

I have a scene in which the student must do multiple tasks to result in a final score that scene. Hopefully, if I get it all figured out, I will have 5 scenes to total a final score. 

I have the variable working the first time through. However, I am allowing the student to retry the scene to get a better before advancing. I have all the slides on reset to initial state so the check boxes are cleared.  I have the variable reset to 0 at the time they click to button to retry. However, when I preview it, the old score and the new score total together on the retry.  

Any thoughts?

Thanks for your help.