How much to fix a vacuum leak on a 99 Honda Civic EX?

I drive a 99 Honda Civic Ex. I had a diagnostic test which told me I have a vacuum leak. My car shakes a lot when idle and tachometer fluctuates. Does anyone know how much it would cost to get it looked at and fixed?How much to fix a vacuum leak on a 99 Honda Civic EX?It depends what's leaking. You don't give enough information.

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