I'm bored so I thought I'll do another comparison:
Emirates FO salary range: $82,700 base to $95,900 top PLUS $12/hr flight pay + 3 meals in local currency per diem
Delta FO salary range: $47,600 base to $124,800 top PLUS $4.50/hr int'l override + $2.50/hr per diem
US Airways FO range: $36,000 base to $94,200 top PLUS $2.20/hr per diem
United/CAL salary range: $26,000 base to $110,900 top PLUS $2.25/hr per diem
So a 90 hour month for the top guys without per diem may look something like this:
EK: $9,088
DL: $14,805
US: $9,810
UA: $11,880
These numbers are just hourly rate x 90 hours and pay is much more complicated than that, but I did find these numbers interesting.