Don't fall into the trap of masking structural errors in your spreadsheet.
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How to tidy up Excel spreadsheets

Messy Excel data can be a huge time-waster and a major roadblock to getting real insights. When you deal with an Excel ...
The Not function in Microsoft Excel is a built-in Logical function, and its purpose is to reverse the logic of its argument. It ensures that one value is not equal to another. When given TRUE, NOT ...