The Habitual Mistake

 An employee walks into the Accounts office and says "What is the meaning of this. I have been paid $200 less than what was decided upon." 



The Accountant replies "I know about it, but you did not complain when we paid $200 extra by mistake last month." 



The employee snaps back "Yeah, I can bear with occasional mistakes but when you make it a habit I think I need to report."