Which parrot should the accountant buy?

 An accountant went into a pet shop to buy a parrot for company in his office.

The shop owner showed him a pretty parrot on a perch and explained that it was ideal for an accountant as it knew some mild swear words but only used them when it heard someone say  "HMRC".

The accountant asked how much it was and the shop owner said it was only a hundred pounds.

The accountant felt he could invest more than this so asked if there were any other parrots.

"Certainly" replied the shop owner. "This blue one doesn't swear at the taxman but he will learn your clients' names and greet them personally whenever they come into your office. This one is for sale at one thousand pounds".

This was more than the accountant wanted to spend so he asked the price and talents of a third parrot that was sitting quietly in the corner of the pet shop.

"Aha" said the shop owner. "That's the most expensive parrot. It costs five thousand pounds".

The accountant was astonished any parrot could cost that much. "What the heck can it do?"

To which the shop owner replied "To be honest, I've never seen him do a darn thing, but the other two say he's their Senior Partner."