Cognos 10.2.1 DQM and Crosstabs calculations

I have the strangest thing happening in a Cognos 10.2.1 Fixpack 3 Report Studio report.  I have 2 queries that count male and female students (based on different criteria).  I am joining the 2 queries based on Gender and Term.  I am attempting to add the Male students (MSQ1 + MSQ2) together and female students (FSQ1 + FSQ2) together and list these totals in separate columns in the crosstab (Male Total / Female Total columns).  I created a new data item called Total by Gender ([Student_Count_Query1] + [Student_Count_Query2]) then I used this as the measure of my crosstab.  What I am seeing is the new data item (Total by Gender) is rendering a result that appears to be concatenating the values ([Student_Count_Query1] and [Student_Count_Query2]) together.  For example I have 1086 male students from Query 1 and 99 male from Query 2 and my Total by Gender for Male students shows as 108699 in the crosstab (the same type of result happens in the women's column as well).  I am not sure if I am doing something wrong with the changes that have been made when using DQM supported reports (because the above method works just fine when I run the same exact report using a CQM based version of the package).  Just wondering if anyone has seen anything like this and if so what did you do to get around it.  I am experimenting with some things (aggregation settings / data item expression, etc...) and have not had any success to this point.   Any ideas welcome.  Thanks.
ktQueBITAsked:
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ktQueBITAuthor Commented:
Found the solution.  I ended up having to cast the my count based data items as integers.  Then the combined data item I used as the crosstab metric added the values instead of concatenating them in the display.  

EXAMPLE:

Base Count object data item definition

cast ([Athlete Count] , integer)
cast ([Non-Ath Count], integer)

Combined count data item definition

[Athlete Count] + [Non-Ath Count]

Once this casting change was added the crosstab calculated the measures correctly.
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ktQueBITAuthor Commented:
This was the solution I was looking for and learned a little about how crosstabs work using DQM enabled packages (much different that CQM versions of Cognos).
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