ls question

[Michael Sullivan]

I've only been using Linux for about a year now (actually it's a year
this month).  My first computer was an IBM 8086 clone with MS-DOS 2.0. 
I liked MS-DOS a lot better than MSWindows because if something went
wrong, the problem was a lot easier to find:  all the files needed for a
single application were all kept in the same directory, etc.  Anyway, in
MS-DOS, when you ask for a directory listing, it listed the files in the
directory you were asking for (like ls), but it also gave a listing of
the total bytes contained in the files in the listing you asked for.  I
was wondering if there was any way I could do that with ls.  I know that
with nautilus you can do a Cntrl-A to select all the files in the
directory you're currently viewing and the total byte size will be shown
in the status bar, but is there a way to find out from a terminal
window?