10:09   The Hidden Cost of \"Clean\" Design 7:52   The Hidden Costs of Hamburgers 11:31   The Hidden Cost of Rising Console Prices 2:56   Opportunity Cost: The Hidden Cost of Everything 6:45   The Hidden Cost of Buying Gold | Claudia Vega | TED 5:31   The Hidden Cost of Being Frugal 12:55   The Hidden Costs of a Paid-Off Home (What You Haven't Calculated Yet) 10:44   the hidden cost of \"pro\" stock bikes 7:01   The hidden cost of pettiness | Zoe Fragou | TEDxAthens