package ConditionalStatementsAdvanced.Lab;

import java.util.Scanner;

public class SmallShop {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String product = scanner.nextLine();
        String town = scanner.nextLine();
        double quantity = Double.parseDouble(scanner.nextLine());

        double total = 0.0;


        if (town.equals("Sofia")) {
            if (product.equals("coffee")) {
                total = quantity * 0.5;
            } else if (product.equals("water")) {
                total = quantity * 0.8;
            } else if (product.equals("beer")) {
                total = quantity * 1.2;
            } else if (product.equals("sweets")) {
                total = quantity * 1.45;
            } else if (product.equals("peanuts")) {
                total = quantity * 1.60;
            }
        }
        if (town.equals("Plovdiv")) {
            if (product.equals("coffee")) {
                total = quantity * 0.4;
            } else if (product.equals("water")) {
                total = quantity * 0.7;
            } else if (product.equals("beer")) {
                total = quantity * 1.15;
            } else if (product.equals("sweets")) {
                total = quantity * 1.30;
            } else if (product.equals("peanuts")) {
                total = quantity * 1.50;
            }
        }

        if (town.equals("Varna")) {
            if (product.equals("coffee")) {
                total = quantity * 0.45;
            } else if (product.equals("water")) {
                total = quantity * 0.7;
            } else if (product.equals("beer")) {
                total = quantity * 1.10;
            } else if (product.equals("sweets")) {
                total = quantity * 1.35;
            } else if (product.equals("peanuts")) {
                total = quantity * 1.55;
            }
        }

        System.out.println(total);
    }
}