How do I freeze data in the spreadsheet so no one can change it?
I have store daily sales in a spreadsheet then another sheet that breaks the
daily sales into monthly catagories. Once the month is over, I want to keep
this data frozen. So if I accidently put todays data in the wrong month I
want excell to tell me, "sorry stupid, you already froze this data and can't
change it!" Is this possible?
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