'The Summer I Turned Pretty' contains a bounty of Taylor Swift songs from many of her albums, and Season 3 is sure to have more. Read our guesses.

How to calculate return on investment (ROI), the money an investment made relative to its cost, in Microsoft Excel.

A complete history of Taylor Swift's relationships and ex-boyfriends, from Jake Gyllenhaal to Joe Alwyn and Matty Healy.

Excel and Google Sheets have three functions to calculate the internal rate of return: IRR, XIRR, and MIRR. Learn how these functions can calculate investment returns.