Displaying the last element in a last page footer

[uniteddeveloper]

Referring the code below, I have an XML datasource that has a number of <stock> elements.  Within each stock element is a sub-element named <line-comment>.  All but the last <line-element> is blank.  The last element contains a string that I would like to display in the last page footer.  The question is how do I do this using iReport 3.7.4?

Code:

<invoice>  <stock>    <line-element></line-element>  </stock>  <stock>    <line-element></line-element>  </stock>  <stock>    <line-element></line-element>  </stock>  <stock>    <line-element>A string for the last element.  I want this to be displayed in the last page footer</line-element>  </stock></invoice>