Ok guys, it is really painfull to ask, because the question is easy, but I need help anyway:

I need the cost price of a Liter Beer:

1 Liter has the price to costumer 10€

Margin is 200 % in one distribution area and 150% in another distribution area

How do I calculate the cost for a liter Beer out of this?

(I know the answer should be 1.33 - but how do I get there?)