Where can I see how many Power Stones upgrading treasures costs?

Help me :)
When you tap a treasure it will show you how many stones it takes for upgrading it on the upgrade button.
:facepalm:
I had it in german and Its not shown how much it costs there.
I had it in german and Its not shown how much it costs there.
If u try switch language to English u can see. And ofc it's not a single unseen option, u can find a few more