GOT YOUR NUMBER FT.
Performer displays 5 panels, with different numbers on each side of every panel. The panels are removed, mixed, and reinserted in the stand by a spectator, as performer looks away. The stand is designed so the numbers are completely concealed when panels are placed in stand. The performer turns around, and instantly calls out the total of the numbers on the panel facing the audience. The trick can be repeated for different combinations and different totals.
GOT YOUR NUMBER FT