How much drainage mortar and screed do I need?

Drainage mortar consumption per m² at 5 cm thick = 82.5 kg.

Screed consumption per m² at 0.5 cm thick = 10 kg, including compaction.

Screed
FIT - Flanders - State of the Art Agentschap Innoveren & Ondernemen Vlaanderen Circulair  content= Made In Belgium EIT Climate-KIC Netwerk Ondernemen PMV