Well I'm glad I know which dates to avoid. Thanks for posting this thread.
If I were you, (and Natalie), I would just put them aside for the next time you go to Costco, if its a place you normally go, even it it won't be for a month or so. Why throw money in the garbage?
referred: Jan 2011 rec'd letter from WRH: June 6, 2011 orientation: July 14, 2011 SurgEd: July 5/12 Meet the Surg. Aug 9/12 Surgery Sept 7/12