A opens a margin account with BMO Investorline with a minimum required margin ratio of 40% and an interest rate of 3.8%. A invests in 100 shares of RAE Inc. at a price of $50.63 per share and an initial margin ratio of 60%. They sell the shares at a price of $53.94 one year later. Calculate the rate of return realized by A. Note: If your rate of return is negative, you should include the negative sign in your answer.