To use it, just enter the number of attendees at the event, and an approximate average hourly cost per attendee. This can be salary, loaded costs, or whatever you think is appropriate. Click "Start" when the meeting starts. A running clock on the meeting time will then start, along with a running clock of the cost. "Pause" will stop the timer. When you hit "Start" again, it will pick up where it left off (like stopping and restarting a stopwatch). "Reset" resets the time and cost to zero. On Android devices, you can save it as an app on your device simply by clicking the blue button. There are ways to save to iOS as well, but Apple hasn't provided a one-click means to do so. This video may show you how to do it.
Who knows, bring it to your next long, boring meeting, and maybe it will be shorter! However, I advise using with caution if your boss is running the meeting!
Click here to get the clock. You can freely redistributed this app as long as there is no charge and you maintain the copyright notice.