The formula you typed contains an error. Try one of the following: Make sure you've included all parentheses and required ...

The formula you typed contains an error. Try one of the following: • Make sure you've included all parentheses and required arguments.• To get assistance with using a function, click Insert Function on the Formulas tab (in the Function Library group).• If you include a reference to another sheet or workbook, verify that the reference is correct.• If you're not trying to enter a formula, don't use an equal sign (=) or minus sign (-), or precede it with a single quotation mark ( ' ).• For more information about common formula problems, click Help.