Firstly you have to find out the going price for mcdonalds shares for the day on which you are going to sell. Say mcdonalds shares are trading at $50 per share and you want to sell 75 shares, so you get 75*50 = $3750 - put this in your 'credit' side.

I am in high school doing an enonomics project on budgeting. We are given a job and stock shares and we have to make a spreadsheet. I have 125 shares in mcdonalds and I want to sell some of it. How do I do that? Just in terms of putting it on the spreadsheet.