University of Phoenix-Sacramento Valley to California State University-East Bay buses and trains from $31

Here are some trips other travelers have found on Routefriend.
$31
2h 13m
0 stops
Amtrak
$32
3h 7m
1 stop
Amtrak BART
$33
3h 12m
1 stop
Amtrak BART
$37
3h 28m
3 stops
Amtrak BART