I need a shopping cart displaying prices based on spot gold price per g(preferably from [url removed, login to view] or Hereaus) and my customer adds a commission to the price. Preferably Virtuemart, but anything will do. The site is for Gold bullion selling. There are 12 different bullions - 5, 10, 20 ... 1kg and to each one there has to be an option to add a different commission. Prices should be displayed in €.