[Toivo]

a better way to look at it would be to calculate the actual hours spent by them on the work.

Labor rates vary greatly; can range from $25/hour for a tech stringing wires to $60+/hour for the attentions of the top guy.
I don't see any of the first 4 items taking more than an hour each.
The bucks may have added up while tracking down the various leaks, but unless 1 guy worked for a solid week at $50/hour on this car, the $2K does seem to be high, especially since there seem to be very few parts involved.

I'd be curious too. If you took it to a legitimate shop, they should provide you with an itemized billing.