Hebelek_DE Beginner

I use the beta for over two weeks now (on the european 10x server) and I really love it. I think you really made something great there.
What I really do need is an overview of resource production. Espacially on a 10x server I have to switch sometimes…

? = 39

The answer (at least the first one I've found) is:

9*2+11+13+6-3=45

The answer is E.