You believe shares in XYZ Co. are in for some tough times ahead. You believe the price for XYZ stock is going to go down. You decide to sell shares in XYZ short. XYZ is not currently paying any dividends.

XYZ shares are selling for $75 per share and you decide to sell 1,000 shares short. Your broker requires an initial margin deposit of 50%. If you cover the short at $60, what was your return on the transaction? What would your return be if you cover the short at $80?