How to add a new row based on the values of same column in crosstab.

Sai krishna

<p>Hello,</p>
<p> </p>
<p>Good afternoon!!</p>
<p> </p>
<p>I have a doubt that, How to add a new row based on the values of same column in crosstab.<br>
Pattern:<br>
       Date<br>
a        1<br>
b        2<br>
c        3<br>
b+c    5 // Here this is the new row in the crosstab(Sum of 2nd and 3rd row).</p>
<p> </p>
<p>How to add a new row like this (b+c) in crosstab.<br>
I strucked for this since 4 days. I am unable to get this. Please, help me.</p>