One statistic floating around is that workers spend about 90 minutes a day on nonwork-related computer games and Web surfing, with an estimated productivity cost of $50 billion.
Workers do not spend any time on computer games. 
mnli hypothesis: Workers do not spend any time on computer games.  premise: One statistic floating around is that workers spend about 90 minutes a day on nonwork-related computer games and Web surfing, with an estimated productivity cost of $50 billion.