Hmm, what conclusion should we draw from this...
The good (shop employed) tech has the ultrasonic part cleaner he mentioned. Besides, if I am home doing it on my own time I may be even more detailed oriented and just spend more time enjoying the task.
Also, do some shops that perhaps don't have a full time employee at the service bench pay a tech a flat rate to turn the jobs? That will generate some hustle!
Until the OP comes back with the story behind the bill you're all shooting in the dark.