Hello, I have a question for you.
When choosing the payment method by transfer, we usually offer a 10% discount. I tried to put the value "-10" (negative 10) in the "surcharge percentage" field, but it doesn't take the value, it only increases the percentage by 10% if I put 10.
Where can I modify it so that the negative value is taken in the "bank transfer plugin" and that when they choose to pay by transfer, a discount is applied?
Thank you very much in advance.