Valuation Differences in the Line Item Display 
Use
In the customer line item display, you can display the fields with the valuation difference from discounting or from the flat-rate individual value adjustment.
Prerequisites
You create a line layout variant for the special fields in order to display the valuation difference. To do this, select Customer Accounts ® Line Items ® Customer Line Item Display ®Define line layout under Accounts Receivable and Accounts Payable in the Implementation Guide.
Activities
To display the customer line items, select Account ® Display line items in the Accounts Receivable menu. Select the "Open items" indicator and enter a line layout variant for displaying the valuation difference.