CNN Money's Maribel Aber has your top business and financial news on this Thursday, April 17.

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NEW YORK, NY (CNN) - CNN Money's Maribel Aber has your top business and financial news on this Thursday, April 17.

Jonesboro Liquor Sales Up 5.26 Percent in 2013

Establishments in Jonesboro sold $8.2 million worth of alcohol in 2013, which was up $408,255, or 5.26 percent, over 2012's numbers. In 2013, 38 businesses, ranging from the 501 Club to the VFW, had a private club permit from the Arkansas Alcoholic Beverage Control Board to serve alcohol in "dry" Craighead County. Montine McNulty, the executive director of the Arkansas Hospitality Association, said the increase in sales is because more restaurants are allowed to serve alcohol in the city.

Google stock sinks as mobile struggles continue

Investors are getting impatient with Google' mobile marketing strategy. Google (GOOGL) shares sank 3% in after-hours trading Wednesday after the company posted first-quarter earnings and sales that missed expectations. Of particular concern was a 9% drop in payments from marketers per ad on Google sites. The challenge for Google is convincing marketers to pay as much for mobile ads as they do for desktop ads, a task that's become increasingly pressing as Web usage shifts to smartphones.

KFC brings back its fabled Double Down

KFC is bringing back the Double Down, a bacon and cheese sandwich that uses two fried chicken filets as a bun. But like a spring chicken, it won't be around for long. "Yes, it's true! What is arguably the most talked-about product in KFC history is coming back, but only for a limited time," said KFC spokesman Rick Maynard, in an email to CNNMoney. He said the Double Down will be on the menu nationwide from April 21 to May 25.

5 people you might not tip (but should)

It starts with an awkward moment. A business transaction happens, and it's hard to know what to do next -- is a thank you enough? A handshake? Or is it a good time to slip somebody a few bills? It depends on the service provided. While a waiter might be obvious, not all situations are as clear-cut. "The reason why we tip is to show respect to the service provider," said Diane Gottsman, an etiquette expert. "Part of our responsibility is to be a respectful community member and give to those who deserve a tip, without going overboard."

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