Restaurants and others are said to be using high-tech cash register devices and computer software to make a percentage of their sales disappear from their records. And when the sales are voided by these smart registers -- and wiped clean from backup computers' memories -- not only is the state cheated out of sales tax but the establishment at which the sale was made gets to keep it. Read more: http://www.nypost.com/p/news/busine...in_sales_6PcQkUthfPabdCpDElx0XJ#ixzz1C6XXjqqB