I brought 54g of 18k gold. They told me it was €60 per gram, which seemed very low to me because I checked online and it was €82 that day. Anyway, they quoted me around €1900… 54 x €60 = €3240, which didn't add up, so I left. I went to another place and they appraised the same weight at €4350. So I don't know if the weight calculation you have there is wrong or what happened.