some quick (and probably faulty) math:

Atl Crj FO avg non-nap BLOCK: 76 hr
Atl Crj FO avg non-nap CREDIT: 78 hr

Atl Cr7 FO avg non-nap BLOCK: 82 hr
Atl Cr7 FO avg non-nap CREDIT: 85 hr

Iad Crj FO avg non-nap BLOCK: 72 hr
Iad Crj FO avg non-nap CREDIT: 83 hr