To set a discount that applies from a certain purchased quantity, please go to Products and choose the product you want to apply the discount to. On the discount edit/add screen, find the Product Discount box.
After setting the percentage discount or a new discount, please select a quantity from which the discount will apply. You can specify the unit (box, item, etc.) for the quantity value.
Save the product when you are ready to start the discount.
That’s it. The discount will be applied once the selected quantity is added to the cart, and the info will be displayed on the product page.