Hi, we are attempting to configure the Vendr discounts functionality to achieve the following:

We have a product which can be either a frame (glasses) or lens, distinguished by a property on the product level.

Assume the following items are in the basket:

2 x frames

8 x lenses

We would like to add a percentage discount for every multiple of 3 lenses, so if the user selects 9 lenses they get a percentage discount off all 9 lenses, whereas if they select 8, the discount would only apply to 6 lenses.

Please can you help?

Thanks, Z.