Mapping issue for Summarizing of data

Hi friends...

In the Scnario JDBC-RFC.. in Jdbc there are all the data of sales happened at all branchs for different products...in a month.. now at the end of the month i need post the summarizing data of this into sap..

Can you give me th logic how can i sort and do sum for each branch and perticular product...

When i am posting to RFC the data should be for perticular branch all the products and there amont (sum of all the sales of that product in that branch). and in the same way i need post losses for that product at branch level..

Thanks and Regards

Vijay