Where are you getting that? Assuming you bought 57 songs (since 57.87 is roughly that), 57 * 0.30 = $17.10 to upgrade your iTunes music.
He's assuming, rightly or wrongly, that for those songs he acquired at a discount due to an album purchase, he'd have to do individual upgrades of each song instead of album-wide upgrades.
As to whether or not there will be an album-wide upgrade option, I don't know.
What I do know is that I'm not bitching about this for a couple of reasons...
1. Cassette singles back in the day cost $1.49 to $3.49, and they were crap.
2. Most retailers didn't give you any option whatsoever to "upgrade" your used CD's/tapes... I'm excluding Music-Go-Round from this but I can't remember what, if any, discount they gave you toward brand new unopened CD's.... and even if they did there was no option to upgrade, much less buy new, only some of the songs on any album.