Kerri believes that Bluebill Corporation's stock will drop in value. She borrows 200 shares from a brokerage firm when the stock was selling at $56 per share. When the stock's price dropped to $31 per share, she told the brokerage firm to buy 200 shares of Bluebill's stock. This stock was returned to the brokerage firm in replace of the stock she first borrowed. What is Kerri's profit on her short selling investment