I am trying to use a quantity and radio button combination to generate a price that will be passed on for payment. However the advice in http://help.machform.com/m/using-machform/l/559702-creating-payment-form-with-quantity-calculation
does not seem to work.
I've added a hidden Price field, it doesn't get populated. I added logic to make it visible when the quantity (number) was > 0, still not working. I kept it visible, still nothing.