Many retailers (if not most of them) give you the discount if you only purchase one item when it is advertised as a group discount. CVS, Safeway & Giant, just to name a few, give you the discount on a single item under a group discount. It' is a smart business practice now, especially since we don't want to upset the consumer with something they are accustomed to receiving, and then not providing that same price break at our store(s).