1. Navigate to Lists > Search > Saved Searches > New.
2. Select Search Type = Transaction
3. On the Criteria tab > Standard subtab, add the following filters:
**Type = is Invoice
**Status = is Invoice: Paid In Full
**Account Type = is Accounts Receivable
4. On the Results tab > add the following fields:
**Name > Set Summary Type = Group
**Days Open > Set Summary Type = Average > Function = Round
5. Rename the Search Title.
6. Click Save & Run.