Difficulties Using ISBLANK Function
I am curious what I need I need to do, am relatively new to SS and it's functions. We review products, and often times this analysis requires the product to be sent out to a third-party for analysis. I do not want these third-party days (business days only) counted against the lab's time to complete. What formula do I need to use to accomplish this? Please see below, and note how row 3 gives me #INVALID when the product didn't need to be sent out to a third-party for analysis. Appreciate your time and any help you can provide.
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