1. Navigate to Lists > Search > Saved Searches> New > Item.
2. Under Criteria tab, enter the following:
a. Type: Inventory Item
b. Transaction Fields..Type: Item Receipt
3. Under Results tab, enter the following:
a. Name| Summary Type: Group
b. Display Name | Summary Type: Group
c.Transaction Fields..Date | Summary Type: Maximum
d.Formula (Text) | Summary Type = Maximum | Formula = round({today}-{transaction.datecreated},0)
4. Enter a Search Title and hit Save.