I recall seeing someone post about fees to upgrade an individual segment at one point in time. I think they were talking about Y to PY and it was pretty steep. I can't find that anywhere with search or Google now.

Can someone point me in the right direction or help with that info? I've got one segment on a DONE5 that could be attractive to upgrade to F, but currently there's no A availability on that segment (I have an EF alert set for it).