How to Create a list of things based on a group by RG

Hello all!
I’m kinda new using Bubble, so im stuck in a simple thing.
Im trying to create a new data (copy a list), this list is a Group by in a RG.
I want to group some fields, sum quantities, use average price, total price and other inputs based on this new list.
Is that possible?
Im trying by copy a list of things, but seems like it is not working.

let me show:

My work flows:

My group By:


Does anyone can help me?
Thank you all!