05. Family House

using System;

namespace Exam
{
    class Program
    {
        static void Main(string[] args)
        {
            int howManyMonths = int.Parse(Console.ReadLine());
            double elect = 0;
            double moneyAll = 0;
            double electAll = 0;
            double OtherAll = 0;
            for (int i = 0; i < howManyMonths; i++)
            {
                elect = double.Parse(Console.ReadLine());
                electAll += elect;
                OtherAll += (elect + 20 + 15)*1.2;
                moneyAll += (elect + 20 + 15);
            }
            Console.WriteLine($"Electricity: {electAll:F2} lv");
            Console.WriteLine($"Water: {howManyMonths*20:F2} lv");
            Console.WriteLine($"Internet: {howManyMonths*15:F2} lv");
            Console.WriteLine($"Other: {OtherAll:F2} lv");
            Console.WriteLine($"Average: {(moneyAll+OtherAll)/howManyMonths:F2} lv");
        }
    }
}