Old Economy Traders opened an account to short sell 2,500 shares of Internet Dreams at $70 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 $70 to $80, and the stock has paid a dividend of $3.50 per share.

a. What is the remaining margin in the account? (Round your answer to the nearest whole number.)

b. If the maintenance margin requirement is 30%, will Old Economy receive a margin call? No Yes

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