Commerce Price table is a module that provides both a field type and a display formatter that allows to manage and displays prices in a table based in the quantity so that different prices can be shown depending on the quantity of products that the customer purchases.

It plays nice with the default price field, allowing to hide it in the edit forms and replacing it in a transparent way using the power of rules and all the pricing rules that you apply to prices are also applied to the price table, such as taxes, discounts, etc.