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I am preparing a spreadsheet in which I have to input names from A2:A200. Each name must be different. I would like to know if there is a function that automatically prevent me to duplicate a name in that column range. Thank you for your support.
www.cpearson.com/excel/NoDupEntry.htm

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Hi,

I need to take a column that is in this format:

RThis is for a price sheet for a new business

Howdy~
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