Bronx, NY to Boston, MA buses and trains from $?

Or, see buses and trains from Boston, MA to Bronx, NY.
Here are some trips other travelers have found on Routefriend.
$?
4h 30m
1 stop
Metro-North Amtrak
$?
4h 10m
1 stop
Metro-North Amtrak
$?
4h 58m
1 stop
Metro-North Amtrak