The performer asks any three spectators to think of any four or five digit number. A note pad is handed to the first spectator who is asked to write down the number he thought of....the others do the same. Meanwhile the performer writes down a prediction and seals it in an envelope. The numbers in the pad are added up by a fourth spectator and the resulting number is shown to match the performer's prediction.
Stunning mental magic!
To check the value of an item in your own currency go to the XE.com Personal Currency Assistant by clicking here