Suppose you sell short 75 shares of a stock initially selling for $95. Your margin requirement is 100%.

What is the value of the 75 shares of stock (this is the amount you will borrow a Time 0)?

If the stock price drops to $80 per share, what is the new value of the 75 shares of stock (this is the amount you will pay back at Time 1)?

What is the total $ amount that you made (or lost) on the trade?

What is your return?