The folks at Rescue-Time, who make software that helps you (and companies) figure out how you spend your online time, did a modest calculation based on their user base and concluded that Google's playable PAC-MAN doodle
cost the world over 4.8 million person-hours
of productivity last Friday. "Google PAC-MAN consumed 4,819,352 hours of time (beyond the 33.6M daily man hours of attention that Google Search gets in a given day). $120,483,800 is the dollar tally, if the average Google user has a cost of $25/hr. (note that cost is 1.3 – 2.0 X pay rate). For that same cost, you could hire all 19,835 Google employees, from Larry and Sergey down to their janitors, and get six weeks of their time."
Also, Google made the doodle permanent