If all attributes selected, then apply a discount?

Hi guys,

I have products that each consist of a number downloads (setup as option name/value attributes.)

Each download is priced separately at $0.79.

However if you buy all of the downloads for a particular product I need to apply a discount.

e.g.

1 product containts 10 downloads at $0.79/each (total of $7.90)
If you buy all 10 though I want the total price of the product to be $6.99.

How can this be achieved?

I tried to do this with attribute quantity discount, but it seems there's no way to make it take account of the number of selected attributes.

Can you make an additional Option Value that is All of the Downloads and Zip them all together and give it the special price?

This sounds to me (and more importantly my client) like a workable solution, thanks.

In case anyone reads this in the distant future, Zen Cart could really do with a programmable logic system for attributes so you can set arbitrary rules between them that modify the item or attribute price.

It wouldn't be that hard to do really, but would require someone who really knows the guts of Zen Cart. That person is you. Go to it soldier.