I programmed the Black Scholes Options Pricing Model in college using Excel and uploaded it into EditGrid recently. I believe once I created an account with EditGrid it was easily converted to what you see now. My user name is Eternalist so it showed up in the link as seen below... I left it so people could play with it and change the numbers and percentages. Since I have the original copy of the formulas I figured if anyone sabatoged the spreadsheet I could simply just upload the original again. Hope this helps.
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