You sold short 200 shares of a non-dividend-paying stock DEF at $30 per share with an initial margin of 50%. To borrow the stock, you have to pay a lending fee of $10 (your liability). If the stock is trading at $25 per share at the moment and the short proceeds earn no interest, what is the profit or loss (i.e. current equity value - total invested cash) of your short-selling position? If your answer is not a whole number, please round it to two decimal places. Please ignore units in your answer. For example, if your answer is $60 per share, please input 60.