I’m struggling with the syntax to have the Aging field go blank or 0 instead of NaN when there is no invoice date. IE, calculate/display the # of days since invoice was issued, return blank or 0 if invoice has not yet been issued.

This is the formula I am trying to use. The Invoice Date field is InvoiceDate and I’m using the TODAY function:
IF(
AND(
{Start},
{End}
),
DATETIME_DIFF({End},{Start},‘days’),
BLANK()
)
Thanks!
