To display values of months in one column

Hi experts,

I have a requirement to show my report as follows:

months                     01.2012                02.2012                    03.2012                    04.2012

type   avg expense                                 Amt                             Amt                        Amt                               
a                   55              22                     13                                12                       11

here, avg expenses and amt are the keyfigures. characterstic month is in the column part in query designer.

So the query design is coming like

months      01.2012                    02.2012                    03.2012                    04.2012

type          avg-expenses Amt    avg-expenses Amt    avg-expenses Amt    avg-expenses Amt  
a               10                22          20             13               15           12              10              11      

But I have to show avg expense keyfigure only once in the report as shown above ie total of avg expense for all months together not for each month.

How can I achieve this??

Hope its clear and  I am looking forward for your suggestions.

thanks in advance

Smriti