Hi Myrthi
ByDesign does not support netting yet. We have in the ByDesign Ideas Place the idea (here you can check, if this would help you as well: https://ideas.sap.com/D18668, nevertheless the ideas forum is only one data source for backlog) and you add additional points or vote for this idea. Until there is a standard solution available in ByDesign you need to use the approach described by Harsh.
Best regards, Marlene