Updating variables with with new values, for a shopping cart

how i can update a variable with always different values, like a shopping cart.

I am using the Table component and want to make a small shopping cart.
If i use {{currentSourceRow}, its only updating the current row into my variable, as well for {{currentRow}}.

But how i can update the variable every time new products are added or if existing, update only this part.

Can someone please explain me in a few words how i can do this?


This can be done. But a little more context will help. Are you attempting to add items selected into a cart?

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