I would like to calculate the age (number of days) between start and end dates or today's date and the start date.
I need to check if the start date is populated first.
If so, then check if the end date is populated.
If end date exists, then calculate the number of days between the end date and the start date.
If end date does not exist, then calculate the number of days between today and the start date.
If start date does not exist, then ""