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'.”
(..) You're correct. Generally speaking... Bernie don't go in for personal interviews with his customers. But it's my understanding that you're requesting a sum of cash... somewhat larger than he's in the habit of loaning out. I just don't wanna go through a whole number. Don't worry. Bernie's (..)1974 The Gambler