Hello! I have some structure as
<mt>
<row>
<element>1</element>
</row>
<row>
<element>7</element>
</row>
<row>
<element>4</element>
</row>
......
</mt>
where <row> uccurence is unbounded.
In target structure I need to have a sum of all <element> objects. How can I do this?