public class Main {
    public static void main (String[] args) {
        TaxVisitor tv = new TaxVisitor();

        Necessity milk = new Necessity(2.99);
        Liquor conti = new Liquor(14000);
        Tobacco cohiba = new Tobacco(11.99);


        System.out.println(milk.accept(tv) + "\n");
        System.out.println(conti.accept(tv) + "\n");
        System.out.println(cohiba.accept(tv) + "\n");
    }
}