package ConditionlaStatementsAdvanced;

import java.util.Scanner;

public class P11FruitShop {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String fruit = scanner.nextLine();
        String day = scanner.nextLine();
        double count = Double.parseDouble(scanner.nextLine());

        double price = 0;
        boolean isValid = true;

        switch (day){
            case "Monday":
            case "Tuesday":
            case "Wednesday":
            case "Thursday":
            case "Friday":
                //banana    apple   orange  grapefruit  kiwi    pineapple   grapes
                //2.50      1.20    0.85    1.45        2.70    5.50        3.85
                if (fruit.equals("banana")){
                    price = count * 2.50;
                } else if (fruit.equals("apple")) {
                    price = count * 1.20;
                }else if (fruit.equals("orange")){
                    price = count * 0.85;
                }else if (fruit.equals("grapefruit")){
                    price = count * 1.45;
                }else if (fruit.equals("kiwi")){
                    price = count * 2.70;
                }else if (fruit.equals("pineapple")){
                    price = count * 5.50;
                }else if (fruit.equals("grapes")){
                    price = count * 3.85;
                }else {
                    isValid = false;
                }

                break;

            case "Saturday":
            case "Sunday":
                //banana    apple   orange  grapefruit  kiwi    pineapple   grapes
                //2.70      1.25    0.90    1.60        3.00    5.60        4.20
                if (fruit.equals("banana")){
                    price = count * 2.70;
                } else if (fruit.equals("apple")) {
                    price = count * 1.25;
                }else if (fruit.equals("orange")){
                    price = count * 0.90;
                }else if (fruit.equals("grapefruit")){
                    price = count * 1.60;
                }else if (fruit.equals("kiwi")){
                    price = count * 3.00;
                }else if (fruit.equals("pineapple")){
                    price = count * 5.60;
                }else if (fruit.equals("grapes")){
                    price = count * 4.20;
                }else {
                    isValid = false;
                }
                break;

            default:
                isValid = false;
                break;
        }

        if(isValid){
            System.out.printf("%.2f",price);
        }else {
            System.out.println("error");
        }
    }
}