BBC will pay a dividend of $20 per share at the end of year 1 and a liquidation dividend of $100 per share at the end of year 2. The cost of equity is 10%. If you own 120 shares and want a total dividend of $1,500 at the end of year 1, how many shares do you buy/sell at the end of year 1? (Assume you can buy/sell any fraction of stock. Enter the number of shares to buy as a positive value and number of shares to sell as a negative value)