Amusement park was relax place of everybody not only does relax activities with family but also can does excite activities with friends. Selling system still importance for amusement park for entrance fee and take this revenue to maintenance amusement park and other budget to about, therefore selling system must have performance to highest both impression’s
Easy to use and easy to understand it concept of us group, so system must have design to look simple but have signature of amusement park. And sequence of calculation must easy to control and edit it when developer would like to develop and edit system as appropriate.