"Buy 2 Get 1 Free"

The formula in the subject is very traditional and rather popular in its various incarnations. The general case is "Buy X items of the SAME product and get item X+1 with a discount of Y, no discount on item X+2".

I have looked at "better Together and Qty Discount mods and still cannot figure out a way to do this.

There is a horrible kludge of using many many levels of the standard Qty Discounts and back calculating the values for every quantity, but that sucks ***.

I have tried it for demo purposes: in the attached screen shot it's $10 for 1 item, but $16 for two, ($10+$6)+$10 for 3, and so on. Just look at the discount table and feel the pain. :down:

Please do not ask me why I want it this way: I do not but I have to ?(a manufacturer wants to roll out a specific promotion ).

Help?

Zen Cart doesn't have native support for "Buy X, Get Y Free" sales. However, the new observer system in Zen Cart allows you to do this kind of thing on your own.

Check out this article in the Zen Cart wiki. Do a text search for "Another Real World Example" to find the start of the coding example for a BOGOF (buy one get one free). It's only for one, but you could easily modify it for a purchase minimum of 2.

has anyone implemented ? I'm looking to implement this for a client and am looking for feedback on it. The notes after the code mention some concerns...

I think this is one of the very saught after mods for zen. I do not have enough knowledge to do it but someone must!

sn0ut, did you even visit the link I included above? It describes how to do this, step by step.

virtualahmad, the listed concerns vary depending on your store setup (e.g. tax compliance), and you can certainly mitigate them as you build and implement this. Get the basic logic running, then make adjustments as necessary.

I shone the "bat" light for help and www.thatsoftwareguy.com came to the rescue. He has a paid extension to one of his free modules which allows this.

VERY CHEAP (cost, not quality). Great guy to deal with as well.