Count number of days if status is "Open"

Raman Oto
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Hello,
I'd like to count the number of days from created date to today only if the status of a ticket is "Open". If it's "Closed" I'd like it blank, I'm not sure how to do this.
Here is an image of the ideal results
Thanks!
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Comments
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Perfect! That works. Thank you so much Nic!