Hi. I've got two ebooks for sale on my site, www.raw-food-health.net
What I'd like to do as part of a New Year's sale is to offer 15% off either of the books purchased individually, but 30 percent off if someone buys them both together.
I know how to generate a sale code to do the 15 percent off individual items, but how can I set it up some 30 percent off is deducted if they buy both books together during the sale?
Any help is appreciated.