Working odd summer jobs has been 'the sum of' my experience so far. [=has been all the experience I've had so far]
That picture 'sums' him 'up' perfectly. [=that picture perfectly shows what kind of person he is]
“So, you don't want to go because you think it will be boring?” “That just about 'sums it up'.”
(..) Now. as you all know. Mr. McMurphy... ...has been running a small gambling casino in our tub room. Now. most ot you lost all your cigarettes to Mr. McMurphy... ...not to mention a tidy sum ot money to Mr. McMurphy. And that's why... ...your tub room privileges have been suspended... (..)1975 One Flew Over the Cuckoo's Nest