iTunes always displays the TOTAL amount of storage space all the files in my iTunes library takes up, regardless of whether the songs are checked/selected or not.

My library on my computer is much larger than the capacity of my iPod nano. In order to determine how much of the library I can squeeze onto the iPod, I have to keep deselecting songs and albums until the iPod finally determines that my selected amount to sync up will fit.

My question is simple: Is there a way in iTunes to learn how much storage space all the CHECKED/SELECTED songs take (as opposed to the library as a whole), so I can make a reasonable guess as to how much will fit on my iPod on first crack?

I've got appx. 11 gigs worth of music for a new 8 gig Nano. Given that I'll have about 7 and odd change gigs to work with, I want to figure out how to select roughly that amount of music without having to trial and error it several times.

There is probably a pathetically simple answer, but I can't find anything in documentation or help files.

Thanks!