问题 I'm looking for a way to apply a discount (percentage) based on cart total weight. Example: 10 to 25 kg, set a 5% discount 26 to 50 kg, set a 7,5% discount 51 to 100 kg, set a 10% discount 101 to 150 kg, set a 12,5% discount more than 150 kg, set a 15% discount When one of the rules will be applied there should be a message also like this payment discount shown in the picture. Payment method discount And if also possible showing a message box like the 'added to cart message box' which shows