I'm currently trying to convert some reporting services .rdl's to an equivalent telerik one and have come across a key difference that looks like it should be a common problem but a search across the forum turned up nothing:
In my original report, I have 2 datasources, A and B. Within one field, its value is SUM(A.Fixed) + SUM(B.Cost) however I cannot see how to recreate this within report designer as you can only have one connected datasource to reference at a time.