1 x (10-20 m2) / 1 x (20-30 m2) 10 - 20 m2 10-20 m² 2 x (10-20 m2) 2 x (10-20 m2) / 1 x (20-30 m2) 2 x (10-20 m2) / 1 x (30-40 m2) 2 x (20-30 m2) 20 - 30 m2 20-30 m² 3 x (10-20 m2) 3 x (10-20 m2) / 1 x (20-30 m2) 3 x (10-20 m2) / 1 x (30-40 m2) 30 - 40 m2 30-40 m² 40-50 m²