Result Row displaying wrong values

Dear Users,

I have created a query in Query designer 7.0.

The query shows data with respect to contract numbers of customers.

For example:

Tenants                 Contract number       Net current       Net Old                    %Deviation-KF Formula = net current + net old

    1                            112233                      44                  50                                      94

    1                            445566                       21                 42                                      73

Result                                                           61                 92                                     some wrong value                                                             

Now the problem is when there is a single tenant with single contract number i get right result row output.

But when i have more than one contract number for same tenant my result will show wrong values. I want the result to use the same formula applied for %deviation and calculate the result.

Above it should basically show 61+92 but it shows wrong.

I have tried all possible entries for Calculate result as but it does not work for more than one contract.

Please suggest.

Regards

Zabi