Once a man goes to a shop to buy parrot. He asks the shop owner price of the Parrot:
Shop owner: RS. 500
Customer: Why so costly?
Shop owner: He knows Word, Excel and Power Point
Customer: What’s the price of this second Parrot?
Shop owner: RS. 1000 as it knows Word, Excel, Power Point and also Programming
Customer: how nice, and what’s the price of this parrot which is sleeping?
Shop owner: That’s for RS. 5000 Customer: And what does it know?
Shop owner: That I don’t know, I haven’t seen him do anything, but the other two parrots call him Boss.