hello, i might be overthinking but I am stumped. I have a list of names, some are duplicates, and each has a corresponding date associated with it. My first rule is to identify the first name and if it has a duplicate- then identify it as such. If the associated date falls before 18 month from today, then it would be labeled as "old". if it is within the 18 months then it is "new". How would i create a formula for this?