I'm creating a form where you can enter a credit card number. I set a custom number for the cell and described it as ####-####-####-####. You can enter a 16 digit number just fine, but when you tab away from the cell and the custom number takes place, it changes the last digit to a "0". Has anyone else encountered this? How do I fix it? I was told I could add an apostrophe before the entry, but this form is going to be used by hundreds of employees, so it needs to work automatically. Suggestions?
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