How to get the count of unique entries as the subtotal of a pivot table

Hi,

I have attached an example of what i am trying to do. I can work out how to calculate unique entries by putting in a formula under a pivot table, but is it possible to select an option in the pivot table settting which will give this result?

The Pivot table, by design lists only unique values.. so no need for that formula... there are 157 entries and they are always unique... I am not sure you can include that summary within the pivot table without perhaps adding to the source data and including the result in the table as another column to total.