5x5cm  (400 pieces/m²) = 3,50€ VAT incl./piece = 1.400,00€/m²
13x13cm  (60 pieces/m²) = 14,50€ VAT incl./piece = 870,00€/m²
20x20cm  (25 pieces/m²) = 30,50€ VAT incl./piece = 762,50€/m²
30x30cm  (11 pieces/m²) = price still pending