You are bearish on Macys stock. The current market price is $100 per share and you have $6,000 of your own to invest. You short-sell 100 shares at $100 each. Your brokers initial margin requirement is 60%.

1. How high can the price of the stock go before you get a margin call if the maintenance margin is 30% of the value of the short position?
2. A year later, the price of Macys stock has risen from $100 to $110. What is your margin (in percentage) in the account one year later?
3. A year later, the price of Macys stock has risen from $100 to $110. What is the return (in percentage) on this investment?