Results slide skipped/revisited questions from random draw

I'm hoping someone will be able to help me out with this one.  I'm working in Storyline 2.

I've created a quiz to draw random questions; a bank of 5, draw 3 for the quiz.  I'm including a skip button, so if the learner does not know the answer, they can skip the question.

Once the learner has completed the randomly drawn questions, the skipped questions are shown, from a duplicate bank with different triggers.  However, all the questions (5) have to be used in order for the triggers and variables to work.

I have the variables as value: 0 = quiz in the bank, 1 = question seen/skipped, 2 = question answered.

The results slide in the end, takes the answers from the initial quiz, plus all the questions in the 'skipped bank', making the total out of 8.  Is there a way to calculate the results score from only the questions that were asked and answered?