def add_item(xml, item, index)
      xml.Item :num => index do
        xml.Code item[:sku]
        xml.Quantity item[:quantity]
      end
    end
def add_item(xml, item, index)
      xml.Item :num => index do
        xml.Code item[:sku]
        xml.Quantity item[:quantity]
      end
    end
Code is limited to 12 characters