need help on report

Hello gurus,

Some one help me to solve this report..

i need to display the average for the selected month and the plan amount for the next three months..

also there should not be any variable input.

when user selects a month from filter automatically it should show the data for the next three months (Plan amount).

Help me if some one is not getting the requirement based on ur information i can explain more..

thanks

Srini