Amazon only charged me 49 cents.
As of right now, "Hope of Elantris" is #2 on the Amazon Shorts Bestseller list (http://www.amazon.com/exec/obidos/tg/new-for-you/top-sellers/-/books/13993911/ref=dp_shrt_ts_0/102-2091160-9076935). I guess that means you can bill yourself as a "bestselling author." ;)
Update: As of 4:25pm, you're
"#1 Bestselling Author Brandon Sanderson."