Sumx total in each row

[Anonymous]

Hello all,

In the following image  you see for the customer 301000133 for each invoice number the outstandin amount.

The outstanding amount is calculated by invoiceamount - paid.

The current issue is that i can not return the total value of 1.969.60 for each row (see image 1). 

How can i get the result of 1,969.50 for each row (see image below)? 

Thanks in advanced

[gapage · Accepted solution]

=CALCULATE (
    [Outstanding amount],
    ALLEXCEPT ( Table[Customer] )
)