New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 119th installment in their series of digital spreadsheet magic tricks, you'll learn how to determine if a particular item is in a list of items using two formulas: a ISNUMBER & MATCH function formula & a COUNTIF function formula.