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 535th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the NETWORKDAYS, NETWORKDAYS.INTL, WEEKDAY, ROW, INDIRECT and SUMPRODUCT functions to count weekdays including half (1/2) workdays.