translation.en: Now that assumes half-hour presentations for an average audience of four people with salaries of 35,000 dollars, and it conservatively assumes that about a quarter of the presentations are a complete waste of time, and given that there are some apparently 30 million PowerPoint presentations created every day, that would indeed add up to an annual waste of 100 billion dollars.
translation.zh: 假设平均每四个人 听半小时的报告 四人年薪共三万五千美元 保守估计 四分之一的报告纯属浪费时间， 而且如果每天约有 三千万个用幻灯片做的报告， 那么，年损失金额将高达 一千亿美元。