@JPB,
It surprised me too, and naturally, I've no idea how right the numbers are. Still, it's a help..
On the CSA thing, I've read about it quite a while - I probably won't get into it, re the amount of waste I'd have plus the cost in the first place. Also, some commenters on it list times when they have way too much of a vegetable they have no interest in. (On the other hand, learning time, for new and good ways to cook things.)
I love farmers' markets - the one in Santa Monica used to be fabulous, same with the one near the embarcadero in SF; the ones in Italy, to die for, thinking of Campo dei Fiori and a few others - but the one here is pretty far away for me. Plus, of course, the money.
What I should do is go to the local co-op more often. I didn't like it the one time I went, but that's not enough of a test.