Assuming that I am doing the math correctly (I never was very good at that), I would wonder more about it taking four hours to replace three brake lines (or a little less if the $400 included parts). I used to have a 150, and none of the lines were very hard to get at.

But if you want to see some high labor rates, take a motorhome in for some work, $120 an hour is not unusual, at least in CA. But then everything is expensive in CA, which is one of the reasons I'm not there right now...