You would have to contact a service center near you. Price can vary regionally. It would also depend on what needs to be repaired. See this link to find a location near you:
Well, it looks like if you want to/can do it yourself the replacement screen itself is under $50 at Amazon. If you take it to a repair place, tack on a mark up and labor costs, so you are probably looking at around $200, more or less. Depending on how old your tab is and what the cost of a new tab would be, you would have to decide on the relative value of the repair.
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