Cost to set up rearend

Just wanting to clarify....$250 just for labor sounds about right? Well.. He said it would take about 6 hrs to do it right - with everything cleaned up really well inside the housing and axle, and making for certain its set up right, as well as adding Mopar LSD additive. So $250 divided by 6 hrs is about $41.50/hr. So I guess that's close.