Веб приложение для контроля за вендинговым аппаратом

The web application simulates the operation of a beverage vending machine. Drinks are represented by name, picture and cost. The machine accepts coins in denominations of 1, 2, 5, 10 rubles. Provides the opportunity to buy drinks for an amount equal to or greater than their cost. The application must have a user and administrative interface. The user interface assumes the purchase of drinks - depositing the amount with coins, choosing a drink, receiving change. Access to the user interface is free. The administrative interface should provide tools for managing the machine.