i might have over calculated, but just being on a safe side, coz he is a physical therapist that have 4 per diem jobs, sometimes he works 60 hours in a week, the 2 jobs he is more frequent which he works 8 hours at one, and 4 hours on the other, and that's everyday. the other 2 he picks it up on the weekends.
also since he's per diem status, he doesnt have benefits like vacation pay, 401k, in exchange for higher rate of pay