subtotals on rtf template

Hi I am new to Bi Publisher Reporting. I am changing an invoice report to add Price (Product of Quantity and Unit Price) . I try to store it in a variable and to get subtotal of invoice but its not working. Price Formula working fine: <?xdofx: to_number(LIST_PRICE) * (C_ORDERED_QUANTITY)?>...

HI, I have some knowledge on BI Publisher, but i don't how to add the subtotal values from XML into RTF template. I created a UBE to print the item details and print subtotals of quantity on hand. I have uploaded the xml file to rtf template and inserted detail fields to the template .But i...