Hello,
haven't been working with Crystal Reports so much, so maybe I missed the point here totally but isn't this basic Crystal Reports databse table linking and adding some record selections/ or parameters.
So you have linked those two databse tables t1 and t2 with left outer join in database expert-->links.
Then you add those two selection criterias to Record Selection Formula Editor t2.c2="100" and t2.c3="50".
Or if you want those criterias to be selectable to your users then make parameters out of both of those(t2.c3 and t2.c2).
Again, maybe I missed the point totally cause haven't worked with this program so much.
- Jyri