After Thanksgiving and Black Friday, NYers are surfing into Cyber Monday. Personal mobile devices make it even easier to shop at work, since employers can’t find their cyber tracks. AM New York reports that mobile shoppers were responsible for 16.3 percent of Black Friday’s online sales. That’s up from 9.8 percent last year and 3.2 percent in 2010. Most of the sales were driven by iPads and iPhones. But according to IBM Smarter Commerce, the average order amount dropped 4.7 percent to $181.22 and the average number of items dropped 12 percent to 5.6. But retailers expect the mobile trend to continue upward as devices become more prevalent and consumers trust the security of online commerce.