three green and yellow parrots sitting on a tree branch

One day, a man walked into a pet store to buy a parrot. The store owner pointed to three identical parrots on a perch and said, “The parrot on the left costs $500.”“Why does that parrot cost so much?” the man asked.The owner replied, “Well, it knows how to use a computer.”The man asked about the next parrot. “That one costs $1,000 because it can do everything the first parrot can, plus it knows how to troubleshoot software issues.”Amazed, the man inquired about the third parrot. “And what's the price for that one?”The owner said, “That one costs $2,000.”“$2,000?! What does it do?” the man asked.The owner replied, “To be honest, I’ve never seen it do anything, but the other two parrots call him ‘Boss.’”