Express Checkout PayPal Style!

[lurkerfilms]

Why?

If PayPal doesn't provide an explicit discount line item in the invoice why can't you simply distribute the discount/coupon over the number of items actually sold.

Fixed discounts could be turned into a percentage off per item by calculating the total after the discount and dividing it by the total before discount.

I realize that you have to take into account rounding errors (maybe use the bankers rounding algorithm) but it seems like this could all be done in a deterministic way and then at least the shopping carts items would be preserved in the paypal invoice.

Is there *really* a technical reason why this cannot be done this way?

There is more than one way to skin a cat.

cheers