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import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Shopping {
    public static void main(String[] args) {
        File file = new File("products.txt");
        double total = 0;
        int count = 0;

        System.out.println("===== СПИСОК ПОКУПОК =====");

        try (Scanner scanner = new Scanner(file)) {
            while (scanner.hasNextLine()) {
                String line = scanner.nextLine().trim();
                if (line.isEmpty()) continue;

                int lastSpace = line.lastIndexOf(' ');
                if (lastSpace == -1) continue;

                String name = line.substring(0, lastSpace);
                String priceText = line.substring(lastSpace + 1);

                double price = Double.parseDouble(priceText);
                total += price;
                count++;

                System.out.println(name + " — " + price + " руб.");
            }
        } catch (FileNotFoundException e) {
            System.out.println("Файл products.txt не найден");
            return;
        } catch (NumberFormatException e) {
            System.out.println("Ошибка в цене");
            return;
        }

        if (count == 0) {
            System.out.println("Файл пустой");
            return;
        }

        double average = total / count;
        double vat = total * 0.20;
        double withVat = total + vat;

        System.out.println("-------------------------");
        System.out.println("Товаров: " + count);
        System.out.printf("Итого: %.2f руб.%n", total);
        System.out.printf("Средняя цена: %.2f руб.%n", average);
        System.out.printf("НДС 20%%: %.2f руб.%n", vat);
        System.out.printf("К оплате с НДС: %.2f руб.%n", withVat);
    }
}