A、To indicate how one can get better service. B、To explain the derivation of the word "tip". C、To illustrate why difficult custo

A lot of people don’t like to give waiters extra money—a tip, but maybe those people don’t understand about the waitresses and waiters. You, see, we get very, low wages, most of the time less than the minimum wage. We count on the tips as part of our salary. If waiters and waitresses didn’t get tips, they wouldn’t get enough money to live.
     People ask me, "What is a good tip?" I like to get 15% of the bill. So if a customer has to pay $20.00 for her dinner, I like to get about $3.00 for a tip. Sometimes I expect 20% if I did a lot of work for the customer. For example, if I got her a special kind of food or recipe from the chef. But do you know something? Very often it’s the person you work the most for who gives you the smallest tips.
    But to tell the truth, I do pretty well with the tips. I am a friendly person, so people like me. They talk to me during their meal and leave me a good tip. Of course some people prefer a quiet waitress and every once in a while I get some pretty small tips or no tip at all.
    Once I looked up "tipping" in a dictionary. It said that the letters in word "tip" stand for "to insure promptness". In other words, to make sure we do things right away. The dictionary said that no one knows if that is the real meaning of "tip", but it make sense to me. If we know a regular customer is a good tipper, then we make sure he gets good service.