We request a promotion option that allows tiered discounts to be applied based on the total of combined units of previously defined products within the same sale.

The configuration should allow you to select the participating products, define the quantity ranges and the discount percentage corresponding to each range. The system must add up only the units of the participating products and apply the discount only to those products.

Example

Set up a group with soda, water and soda:

3 combined units: 2.5% discount.

5 combined units: 4.2% discount.

10 combined units: 6.5% off.

If the customer buys 1 soda + 1 water + 1 soda, 3 units are considered and 2.5% is automatically applied to those three products. If you buy products outside the group, these should not affect the calculation or receive the discount