Many of the tasks include pre-programmed spreadsheets to make the challenging calculations easy. Click the link to download. Each tab is labeled a – z. When you’re working in a spreadsheet it resides locally on your computer. You can save and store it there or upload it back to your project for future access from your account.
See how to upload it to your project here.
If you break a formula in a spreadsheet, simply download a fresh copy from the link in the tool.