Former Mayor Giuliani's Restaurant Tipping Fail

We don't know the identity of this restaurant, whether or not it is in New York, or whether or not this diner is in fact former New York City Mayor Rudy Giuliani (the middle initial, W, lines up). But still, it's amusing.

Says one commenter on the original post on Dependable Renegade, "Looks like Rudy stopped writing in his standard tip of $9.11." Now restaurateurs, because of this math error, does this mean the server only gets a $20 tip?
· Math is Hard [Dependable Renegade]
· All Installments of Receiptrocity [~ENY~]