Please note that if you can’t see the What If button in Excel if you are running an older version of Excel, then please go to this website in order to see instructions from Microsoft on how to install what is called the free solver add-in: https://support.office.com/en-us/article/Load-the-Solver-Add-in-in-Excel-612926fc-d53b-46b4-872c-e24772f078ca

Thanks!