Hey NFL, what are all the fines for?

Roughing the Passer $198,443198443
Off field violation $58,82358823
Late Hit $49,60849608
Fighting $44,80444804
Hit on defenseless player $44,10044100
Equipment Violation $37,56137561
Striking/kicking/kneeing $33,07233072
All other 2014 fines of NFL players $221,100221100
Sources: spotrac.com