Each candidate can accept up to $400. To equally max out to all 8 candidates, the max would be $3,200. You can also customize amounts to each candidate if you have already maxed out to one of them:
Nick Hinrichsen - SD 3
Dylan Roberts - SD 8
Tony Exum, Sr. - SD 11
Janice Marchman - SD 15
Lisa Cutter - SD 20
Kyle Mullica - SD 24
Faith Winter - SD 25
Tom Sullivan - SD 27