Multi product discounts

[mbi15]

Hi

I would like to set up a discount where if the customer purchases 4x ItemA and 4x ItemB and 1XIemC they get a discount, but if they are missing any of these items a message appears to tell them what they are missing, and that if they purchase 1 more item they will get the discount.

Here is my website it might help make things clearer. Currently everything is made to order, but soon only in stock items are sold.

The reason I need to do it this way is that I just want to list the individual items and if the user want to buy a pack (combined items) they get the discount.

Thanks

Megan

[swguy]

See your PM.

[mbi15]

Thankyou

Does anyone else know of a way I can do this, without purchasing an add-on. Thanks