Bitrix. Quantity discount?

Question

1C-Bitrix

Good afternoon. The client wants to add a percentage
discount on the product to the site , depending on the quantity of the product. Example: The price of a product is 100 rubles. From 10 pieces the price is reduced by 10% From 20 pieces the price is reduced by 20% This can be implemented for the cart, through the rules of the cart, but how to make it work for catalog.element as well? So that in the element such a table is also displayed in detail, and when updating the quantity of goods, the amount is recalculated immediately in the detailed card?