Question about tipping in tournaments

[xile]

Im pretty new to playing in a B&M cardroom. I was wanting to know whats a respectable tip to give the dealer once placing in tournaments. I dont want to seem like a cheapskate, but I also dont want to tip too much either.

Say its a single table tourney $45 buy-in, and first place is 220 and 2nd is 100. Would 20 bucks be too much or is that pretty much like a standard tip on that payout?