The DOJ is involved in a whistleblower case against Oracle Corp., alleging that it overcharged government customers. It is not uncommon for IT vendors to get ensnared in accusations of contract overcharging. In May, about a year after the government brought its charges, the company paid $87.5 million to settle the case. Large companies that take a constructive approach in responding to the government “are going to be more successful in the long run,” expert says. U.S. agencies, including the Defense Department, spent $189 million in 2009 on Oracle products.”]