Yes, manageable.
Create a dso based on your data source.
try to create transformations between source(data source) and DOS.
While mapping source field to target info object(key fig), check in rule details, you will find that options summation or overwrite.
Note- Please always search with same words on Google you may get what you need.
its too much basic and scn won't teach or help basics. Its helps when your trouble at your profession.
