It's a nice idea with this CP calculation tool, but just translating this into german isn't really gonna help at least not for the EU servers, as we got lower values at froggy :(

The last one was the following:

Small Pouch for (500 Ingots) = instant Coupons*250 + daily Coupons*100

Medium Pouch (1000 Ingots) = instant Coupons*200 + daily Cavekeys*5, Scroll of Myoboku*3, Blue Tool Pack*2

Big Pouch (2000 Ingots) = instant Coupons*1000 + daily Coupons*466

Giant Pouch (3000 Ingots) = instant Coupons*2100 + daily Coupons*750