Will you bring our bill , please ?   Yes , certainly . I'll be back in a minute . Here you are   Thanks.Let me see . I think there's a mistake on the bill here.Would you mind checking , please ?   Of course , not.Let me check.Oh , you seem bo be correct .   How about tax and service charge ?   Only ten percent tax is included in the bill .   Then one hundred U . S . dollars covers everything , doesn't it ?   It sure does . 