To manage an entrance/exit with an identifier on an electronic money storage medium.

A merchandise data processor comprises: time checking means for checking time; identifier obtaining means for obtaining the identifier stored on the electronic money storage medium; detecting means for detecting whether the identifier obtained by the obtaining means is stored on an identifier storage section which stores the identifier and the time when the identifier is obtained in association with each other; time obtaining means for obtaining entrance time corresponding to the identifier obtained by the obtaining means from the identifier storage section when the detecting means detects that the identifier is stored; calculating means for calculating a fee based on the time obtained by the time obtaining means and a fee storage section which stores an admission fee for a facility; and adjusting means for adjusting the fee calculated by the calculating means from the electronic money storage medium.