Jonatan Silva

TTM revenue is a company’s total revenue over the last twelve months. Learn what TTM revenue means, why it matters, and how to calculate it in a spreadsheet.

Cost of capital is the minimum return a company must earn to justify an investment. Learn the formula and how to calculate cost of debt, equity, and WACC.

Use Google Sheets version history to see earlier versions of a spreadsheet, restore or copy one, name the ones you need, and delete old versions.

Seeing the ‘locked for editing by me’ error in Excel? Learn what causes it and how to unlock Excel file for editing when it’s password-protected or shared.

Learn what a fiscal year is, common fiscal year dates, when it starts and ends, how it differs from a tax year, and US filing deadlines.

Learn how to add a Google Sheets checkbox, swap the default TRUE and FALSE values, apply conditional formatting, and copy checkboxes down a column.

When the sharing violation Excel error appears, you can’t save your changes. Here are five ways to fix the Excel sharing violation error in Windows.

Learn what the Google Sheets API is, whether it’s free, what its usage limits are, and how to enable it and create credentials in the Google Cloud Console.

Ten Google Sheets tools that make working with your data faster: add-ons, Apps Script, pivot tables, charts, version history, and more.

Learn Excel file repair step by step. Fix a corrupted workbook with Open and Repair or a manual fix, try a third-party tool, or extract the data.