How to calculate with Inputs

No functionality like that built into the plugin specifically, but maybe a setup of 2 fields. 1 for total amount, 1 for product. Then you could do some math on the total amount fields and echo out the end results.

You’re damn right yes thank you.

But in this opinion i think in my case i need a nested group is there a feat. or a upcoming feat. for this or is the only way to do this a group with repeatable entrys?

not necessarily, though probably ideally. Should be technically able to get something working, it just wouldn’t necessarily all be in one metabox. More spread out among a handful.

You say it’s technically possible in which context?
i can do nested groups now? or cmb2 have the technical aspect to do this in the future?

I’m saying you can create repeatable groups of fields. They won’t be nested repeating groups, which I’m aware is a desired feature by many, but at a top level point of view, that much can be done now.

Repeated groups, closed: https://cloudup.com/crh5m_uZ08t

Multiple fields for each group: https://cloudup.com/cbhXiltlA6X

What’s not really possible at the current state of CMB2 is having a repeater field inside each group there. However, with 2 text inputs inside the top-most group, you’d be fine