package _04_Polymorphism.EXERCISES;

import java.util.Scanner;

public class test {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);

        String product = console.nextLine().toLowerCase();
        String city = console.nextLine().toLowerCase();
        Double quantity = Double.parseDouble(console.nextLine());

        double price = -1;


        if (city.equals("sofia")) {
            if (product.equals("coffee")) {
                price = 0.50;
            } else if (product.equals("water")) {
                price = 0.80;
            } else if (product.equals("beer")) {
                price = 1.20;
            } else if (product.equals("sweets")) {
                price = 1.45;
            } else if (product.equals("peanuts")) {
                price = 1.60;
            }
        } else if (city.equals("plovdiv")) {
            if (product.equals("coffee")) {
                price = 0.40;
            } else if (product.equals("water")) {
                price = 0.70;
            } else if (product.equals("beer")) {
                price = 1.15;
            } else if (product.equals("sweets")) {
                price = 1.30;
            } else if (product.equals("peanuts")) {
                price = 1.50;
            }
        } else if (city.equals("varna")) {
            if (product.equals("coffee")) {
                price = 0.45;
            } else if (product.equals("water")) {
                price = 0.70;
            } else if (product.equals("beer")) {
                price = 1.10;
            } else if (product.equals("sweets")) {
                price = 1.35;
            } else if (product.equals("peanuts")) {
                price = 1.55;
            }
        }
        double endPrice = quantity * price;

        System.out.println(endPrice);
    }
}