The program automatically calculates and updates  the contents of this field by multiplying Cena enote and Kolicina,  and subtracting Vrednost popusta vrstice from the obtained product.
Program samodejno izračuna in posodobi vsebino tega polja tako, da pomnoži polji Cena enote in Količina ter od dobljenega rezultata odšteje Vrednost popusta vrstice.