I've done a search, but can't find the answer, so I apologize if this has been covered before. If I have a 5 day hopper pass with a value of $189, can I use that to upgrade to a So. Cal. Annual pass plus parking at $229? Or can the hopper pass only be used toward the pass price, not the parking add-on? Also, does the upgraded pass have to be of greater value? I can't imagine I could use the hopper pass for an annual pass and just "forfeit" the difference, right? Thanks in advance.