Drupal Commerce contrib project that allows to have a secondary price field that considers the quantity for displaying and using the prices. It also provides a field formatter to display the price/quantity values as a table.
- Enable the module
- Create a new field in the product bundle of the type 'Price table', with unlimited or a fixed set of values.
- Add/edit your products and add them as many prices as you want and the quantity ranges. Use -1 for "Unlimited".
- You can hide the original price checking the setting "Hide default price" in the field settings.
- You can display the price table in horizontal or vertical just changing the formatter setting.
- Recommended: Enable the quantity field for the add to cart display formatter in the product display settings.
Watch the screencast of this module featured in the Commerce Module Tuesday.