ZenCart Tutorials – How to set Quantity Discounts in ZenCart
Setting up quanity discounts for a product is done through the Product Price Manager. That is located in the Catalog menu.
Find the product you would like to have the discount for, and click the Edit button.
On the new page click the Add Blank Discounts button and fill in the details for the volume discounts.
Click the Update button at the botom of the page to apply your new settings.
Those will be visible in the table at the next page.
Source: http://www.siteground.com/tutorials/zencart/
This tutorial is provided free of charge and without any warranty of any kind.
