package Exam;

import java.util.Scanner;

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

        int computers = Integer.parseInt(scanner.nextLine());
        double sales = 0;
        double avgPercent = 0;
        for(int i = 1 ; i <= computers; i++){
            int number = Integer.parseInt(scanner.nextLine());
            int lastDigit = number  % 10;
            int remainingDigits = number / 10;
            double percents = 0;
            if(lastDigit == 2){
                percents = 0;
            }else if(lastDigit == 3){
                percents = 50;
            }else if(lastDigit == 4){
                percents = 70;
            }else if(lastDigit == 5){
                percents = 85;
            } else if (lastDigit == 6){
                percents = 100;
            }
             sales += remainingDigits * (percents / 100);
             avgPercent += lastDigit;
        }
        avgPercent = avgPercent / computers;
        System.out.printf("%.2f%n",sales);
        System.out.printf("%.2f",avgPercent);
    }
}