The first item is the cover charge. You know that the main course was 7.8 dollars not 6.8 dollars, so item 5 is the difference. 可以，第1项是附加费。主菜是7.8美元，不是6.8美元，因此第5项是差价。

Could you kindly explain this to me? What is item 6? 请给我解释一下，第6项是什么？

The first item is the cover charge. Number 2 is the beer. Then your starter, your main course and the vegetables. 第1项是附加费，第2顶是啤酒钱，接着是第1道菜、主菜、和蔬菜钱，

The main course was 5 not 4, so item 6 is the difference. 主菜是5而不是4，故第6顶是补差价。