We usually do a price for the first voice drop and first Data Drop.
Let say $75 like your example,then charge less for each addition to the same spot. like 60 or 65 for the additional
so it would be 75+60+60=$195
The time saver is in running the cable, But you still have to punch down each cable AND you end up with more cables to sort thru so in reality you still end up with plenty of labor for the extra runs.
We use the Brother P-Touch for the labeling.
Check out
www.ptouchlables.com The tapes are less than half of the cost at an office store. I just bought the PT-1650
Don