Thanks Jason, I see the bindings thanks. I think I gave you the wrong idea above. I need to discount to be a percentage of the total cost for the item.
If item x has a price of 1 Euro and it has qty of 3 the discount would be 3 Euro - 5%.
At the minute I think we are just working out the discount on the Item price and taking that from the total.
Also, at the minute when I add two different items to the cart each with a different price per unit and a qty of 6 or more they both get the exact same discount showing. Appreciate this may heading to a premium ticket.
I attach a screen shot. Thanks Jason