You buy 100 shares of Shares of RossCorp on margin account and the current price of the stock is $45 per share. Brokerage commissions are 2 percent for purchases and 2 percent for sales. The interest rate on margin debt is 6.25 percent per year. The initial margin is 60 percent. At the end of one year, shares of RossCorp stock are selling for $55 per share. What is your rate of return if you sell RossCorp stock