So I have four 5 day park hoppers in my MDE account. They are leftover from sometime in 2012/2013, but I'm honestly not sure the exact date I bought them and from where. My best guess is I bought them directly from Disney, probably through DVC Member Services. I called Disney today to see if they could tell me what the cost will be to upgrade them to 7 day PHs. The CM could not tell me how much, only that it "probably won't be much". So I called back and spoke to a second CM. She also wasn't able to tell me how much, said that their system has no way of checking what I paid for the tickets. I'm not trying to get something I don't deserve, I'm just trying to plan so I know what the cost will be. Is there really no way of finding out in advance what the cost will be? Only to go to Guest Services once we get to Disney and ask them? If it were just me, I'd take my chances, but I'm offering these to extended family members and trying to help them understand the cost before they get there if they want to stay longer. Thanks for any help!