all-in odds question

[phifediggy]

i witnessed this in a cash game tonight and there was a debate, so i'm letting 2+2 clear it up.

3-handed 5/10 NLHE
SB (215) posts 5
BB (~1500) posts 10
button (~1200) straddles to 30
SB re-straddles to 50 (not even sure if that's legal)
BB raises in the dark to 215, putting BB all-in
button folds
SB has 76o -- what's the right play?