Lafka keeps getting better and better with each new version and the main reason are our users, because we listen to your real business needs. Since version 3.1 you can use addons with negative values. Now you can substract value from the main product price based on addons. Helpful when you want to remove ingredients and decrease the product price (e.g. – no Onion and no Mustard options in the burger, so the price drops)