Figure 3. Add, Delete, Rearrange, or Edit Order Line Items The context menu for repeating tables lets users insert new items above or below an existing item. Rearranging the list requires cut, insert, and paste operations. The Order Details table's Extended column is an InfoPath expression box, which executes an @Quantity * @UnitPrice * (1 - @Discount) XPath instruction. XPath expressions accept data fields only, so generating a total order amount value requires executing script from the OnAfterChange event of the UnitPrice, Quantity, and Discount text boxes.