Building parameters for the query builder

So here's a Query I need to build a subreport around...

<cfquery name = "ac" datasource= #ODBC_DataSource#>

  SELECT tblArea.OIDEMSMaster, tblAreaStructure.OIDStructureTypeRef, Count(tblAreaStructure.OID) AS CountOfOID,

  SUM(tblAreaStructure.SF) AS TotalSF, SUM(tblAreaStructure.ReplacementCost) AS TotalRC, SUM(tblAreaStructure.LSI) AS TotalLSI

  FROM (tblArea INNER JOIN tblAreaLocation ON tblArea.OID = tblAreaLocation.OIDArea)

  INNER JOIN tblAreaStructure ON tblAreaLocation.OID = tblAreaStructure.OIDAreaLocation

  GROUP BY tblArea.OIDEMSMaster, tblAreaStructure.OIDStructureTypeRef

  HAVING (((tblArea.OIDEMSMaster)=#URL.OIDEMS#));

</cfquery>

And this is what I did in the 'builder':

So I did the join from tblArea (primary key) to tblAreaLocation (foreign key), and then tblAreaLocation (primary key) tblAreaStructure (foreign key).

I think I got this on right (options/suggestions...)!

So I'm trying to build this: SUM(tblAreaStructure.SF) AS TotalSF, SUM(tblAreaStructure.ReplacementCost) AS TotalRC, SUM(tblAreaStructure.LSI) AS TotalLSI

In the Paramenters I set TotalSF as the name and the default values to: SUM(tblAreaStructure.SF) IS TotalSF (via the query builder), and the same set for TotalRC & TotalLSI...now where in the query do I set up TotalSF, TotalLSI, TotalRC? I think I didn't use the Parameters correctly!