Total line in a matrix

I am working with a matrix. How can I add a total line to the bottom of the matrix? I want to be able to add the row in red.

01/31/200602/28/200603/31/200604/30/200605/31/2006
Rep1115.%92.%96.%96.%89.%
Rep2138.%82.%90.%91.%85.%
Rep3162.%109.%115.%106.%109.%
Rep4108.%153.%134.%139.%114.%
Rep5131.%121.%120.%110.%101.%
Rep6103.%88.%110.%107.%99.%
Rep7166.%124.%103.%97.%89.%
Total0.%0.%00.%0.%

[13413 byte] By [rs12345] at [2007-12-22]
# 1
I was able to get the total lines to display. Now, how can I edit the expression so it does not mearly sum the columns and rows?
rs12345 at 2007-8-30 > top of Msdn Tech,SQL Server,SQL Server Reporting Services...
# 2

In this post: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=19062&SiteID=1

I found that the subtotals will have the same calculation as the matrix details. I simply changed the calculation from SUM(blah.blah) to field1/field2.

rs12345 at 2007-8-30 > top of Msdn Tech,SQL Server,SQL Server Reporting Services...

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