I'm trying to assign values to each checkbox in the single choice so that the result is displayed at the end as a "purchase summary", that is, my intention is to assign a value in BRL to each checkbox, as soon as the user chooses the box with the flavor he wants, a value is stored and then the purchase summary is shown, but I'm not able to do this, it always gives an error, and I tried AI task but it didn't work (or I'm doing it wrong)