Clutch fluid leak question

Hey,

Well I took my max in today and they are replacing rear brakes, belts, and repairing the slave cylinder.

I've had the car for about a month, and the clutch acts funny sometimes when I abuse the clutch (because of the leak), and at one time the pedal sunk all the way to the floor.

Here is my question: How do they "repair" something like this? Repairing the slave cylinder doesn't mean "bleeding", does it? I beleive a mechanic did this when the pedal sunk to the floor, which I'm assuming temporarily fixed the problem. I'm really just worried that if I ever averuse the clutch anymore (even after they repair the slave), this will happen again, should I be worried?

I'd need a new clutch soon, my 99 maxima has 128k miles on it, with original clutch.

Also - did the friendly neighborhood gas station overcharge by a lot?

Belt Replacements: $120
Rear Brakes: $220
Fluid Leak (Slave Cyl.): $230

Thanks a lot!
Dan

wow, my mechanic just replaced mt slave cylinder for 100, also replaced my clutch for 400