Detailed calculation:
Copper surcharge per kg:(12,70 EUR/kg − 1,55 EUR/kg) × 1,01 = 11,26 EUR/kg
Metal surcharge per item:11,26 EUR/kg × 4,00 kg = 45,04 €
Net item price excluding metal surcharge:630,30 €
Total net price:630,30 € + 45,04 € = 675,34 €
VAT:675,34 € × 19,00 % = 128,31 €
Total gross price:675,34 € + 128,31 € = 803,65 €
Intermediate results and final amount are rounded commercially.