OK Here's a strange one. I sell my photos online. Each photo is a product. i.e.
IMG_1234 is a product and can be baught as 6x4, 5x7, 8x10 and 12x8 (for example).
I want to be able to offer a discount if someone orders XXX images as 6x4 or YYY images at 8x10 no matter which images/products they are, do qty discounts ACROSS product lines.
eg if someone buys 1 6x4 I will charge $5, for 3 - $2.50 and for 5+ - $1. I can set up QTY_discounts but they only work for that 1 product (image in this case). Is it possible to do this Qty_discount across all products??
Thanks - http://trenthaines.myphotos.cc/shop