Old Economy Traders opened an account to short-sell 1,000 shares of Internet Dreams at $120 per share. The initial margin requirement was 50%. (The margin account pays no interest.) A year later, the price of Internet Dreams has risen from $120 to $131.20, and the stock has paid a dividend of $20.00 per share.

a. What is the remaining margin in the account?

b. What is the margin on the short position? (Round your answer to 2 decimal places.)

c. What is the rate of return on the investment? (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.)