pivot table to ignore data where n<2

I have a pivot table giving the sum and deviation of a column of data. How can I get the pivot to exclude data where the count of a batch is less than 2? Sample attached

Hi

I have added a new column to the source data with a formula of
=IF(COUNTIF($B:$B,B7)=2,FALSE,TRUE)

In the attached workbook, I called this column Include and added it to the Page field area, and selected TRUE