Pay attention to the details of those first year salary numbers. That "$73,000" includes hourly salary, bonus, health insurance, 401k match, per diem and hotel benefits. I'm not saying it isn't good money, but it's a little misleading.

I also had the same question about the second year salary and was told "the general rule of thumb is to multiply your hourly rate by 1000 to gauge your annual salary". My math makes the year two salary at $42,000 plus all the health insurance, 401k match, per diem and hotel benefits. One plus is that the bonus is paid out in three lump sums with the final $7,500 coming at your one year anniversary.