how to calculate(sum up) an a row value of an datatable
<p>i have an datatable like this.
i am getting this  data  from an excel sheet and  converted  to  datatable</p>

<pre><code>id  workedhours  tfshours
1     3          2
2     5          5
3     .7         3
4      2         3.2
5     4.3       6.8 
</code></pre>

<p>now i need  the  sum  of the column workedhours and  tfshours</p>

<p>how can i achive that is .there any builtin  function to get the sum of teh  column </p>

<p>i need  the  result like  this  in  a  new  datatable</p>

<pre><code> workedhours   tfshours
15                20
</code></pre>

<p>any help  would  be  greatly appreicated.
 thank you </p>
