PB 2017 R2

Hi All

I hope you can help, i feel this really should be a simple problem but i have not been able to sort it so far

I have a tree view window, which lists invoices in the top level , the expandable part has the invoice items , i want to show a sum of those items in this level - per invoice

If i add a sum - sum for group 1 - i get a total for all the top level - how do i sum these items 

regards and thanks as always

Andrew