options: m : really ? you mean i tipped too much and the customers usually tip 10 percent at a restaurant ? m : really ? you mean it 's not a regular tip and the customers usually tip 20 percent at a restaurant ? m : so , you mean i should have left at least a 25 % tip although the customers usually tip 15 percent at a restaurant ? m : so , you mean i should have left at least a 15 % tip as the customers usually tip 15 percent at a restaurant ?
article: m : where do you work , fiona ? f : i work in a restaurant . m : then you must know about how people tip very well . i came to this country just last week . i really do n't know how to tip . yesterday ordered a five dollar 95 cent beer , i gave the waitress $ 6 . 00 and asked her to keep the change . she did n't give me a happy look . f : well , you tipped too little . you should have left at least a 15 % tip . that 's a regular tip .