After six weeks of US release, Dreamworks/PDI’s computer-animated bug pic “Antz” saw a rare 20% boost in box office business this weekend placing fifth. Despite losing 300 screens and new competition for the family crowd from the re-release of “The Wizard of Oz,” the film grossed an estimated $5.4 million in 2,604 theaters bringing the film’s cume to $74.8 million.