clients budget is updated on sale basis. this means that every month their budget gets updated based on their sales.. in this case they will always have the amount they need to pay for their contracts. i know that this is a non realistic requirement by the client but we are just looking for a solution in sap for this.. so far i am unable to find one.. the logic presented by you is completely true and realistic in case of funds management and budget consumption i totally agree with that.
Regards,