You decide to sell a round lot of Tuna Boat short when it is selling at its yearly high of 22 1/4. Your broker tells you that your margin requirement is 55 percent and that the commission on the sale is $55. While you are short, the stock, Tuna Boat pays a $.75 per share dividend. At the end of one year you buy backTuna Boat shares at 18 3/8 /share and are charged a commission of $45 . What is your dollar return on the investment?