Cash register

A cash register, comprising:

• a banknote input module, comprising
• a first housing and a banknote transport mechanism, the first housing having a banknote inlet, a banknote outlet and a first combination frame, the first combination frame comprising a first upper wall, a first lower wall and two first side walls, the banknote transport mechanism being disposed in the first housing and located between the banknote inlet and the banknote outlet;
• and
• a banknote storage module, comprising:
• a second housing and a banknote storage pressure plate, the second housing having a second combination frame, the second combination frame comprising a second upper wall, a second lower wall and two second side walls, the banknote storage pressure plate being movably disposed in the second housing and abutting against the second combination frame;
• wherein by selectively coupling the first upper wall and the first lower wall respectively to the second upper wall and the second lower wall or coupling the first upper wall and the first lower wall respectively to the second lower wall and the second upper wall, the first combination frame being coupled to the second combination frame, thereby combining the banknote input module with the banknote storage module;
• wherein a banknote entering the first housing from the banknote inlet and being transported by the banknote transport mechanism and entering the second housing through the banknote outlet, the banknote storage pressure plate pressing the banknote to the second combination frame.