As of January 25, 2014, Cisco had repurchased and retired 4.1 billion shares of Cisco common stock at an average price of $20.53 per share for an aggregate purchase price of approximately $84.9 billion since the inception of the stock repurchase program.
A RealAge answered. You can expect to pay anywhere from $10 to $40 for a tray-based teeth whitening kit purchased over the counter (OTC) from a pharmacy or other retail store. You can also purchase tray-based teeth whitening systems from dentists. These systems feature custom-fit tooth trays or mouthpieces, which is why they are significantly more expensive than OTC tray-based teeth whitening kits. Purchasing a tray-based teeth whitening system from your dentist may cost up to $500.
Sometimes a laser is used, but more commonly a halogen, or LED light is used as a catalyst to speed up the whitening process. The cost is dependent most on the area you live and the specific technology being used to whiten. The average cost listed at on RealSelf is $400 and I would agree that is in the ballpark. In my office this type of whitening ranges between $279-600. The least expensive type of in office whitening is the LED which can provide pretty good results for most people.