The fine for roughing the quarterback has been established by the NFL and NFLPA. It's $16,391 for the first offense, $21,855 for the second offense. It apparently doesn't matter who the QB is or how hard the QB was roughed.
From this site: [
operations.nfl.com]
The fines collected are donated to the Professional Athletes Foundation to support Legends in need and the NFL Foundation to further support the health, safety and wellness of athletes across all levels, including youth football and the communities that support the game.
Since 2011, about $4 million a year has been used to support these worthy causes.
AlbaNY_Ram