Sort elements into a list

Hi guys.

I start with dynamo same days ago and i have some problems.

I need to filter the list based on a room name ( ENTREE ) . Then , sort everything according to the apartment’s name and export only the surfaces in proper excel columns . My list will have to include only the surfaces of all rooms " ENTREE " ordered by apartment number . The apartments that do not contain the room " ENTREE " will have a value of 0 and does not disappear from the list .
I hope I was clear enough.

A- 1-1-1 6 m²
A- 1-1-2 0 m²
A- 1-1-3 3 m²

Enclosed is the dynamo knot that I can not finish.

Thanks all!

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