Take me to this address , please .   Yes , Ma'am . Here we are .   How much do I owe you , sir ?   30 dollars , Ma'am .   Are you kidding ? The meter says 15 dollars , doesn't it ?   Yes , but we need some extra charge and some tip too .   I don't get it . I'll go and have our doorman talk to you then .   Ok , Ma'am . Calm down , 15 dollars will do . 