I would like to count the number of customers that have not been assigned a [Delivery Date] when [Order Date] is more than 30 days ago (based on today() function). Sample list:
Order Date Delivery Date
2008-10-01 2008-10-05
2008-10-02
2008-10-03 2008-10-07
2008-10-04 2008-10-08
2008-10-05
2008-10-06 2008-10-10
Conditions:
(1) List is in Excel 2007 tables, so formula must be something like =COUNTIF(Sales[Order Date]....
(2) No intermediate calculations, just one function
(3) Dynamically updated (based on today's date)
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