FoodDelivery

using System;

namespace _07.FoodDelivery
{
    internal class Program
    {
        static void Main(string[] args)
        {
            double chickenMenu = 10.35;
            double fishMenu = 12.4;
            double vegMenu = 8.15;
            double deliveryPrice = 2.5;

            int numberOfChickenMenus = int.Parse(Console.ReadLine());
            int numberOfFishMenus = int.Parse(Console.ReadLine());
            int numberOfVegMenus = int.Parse(Console.ReadLine());

            double priceForChickenMenu = numberOfChickenMenus * chickenMenu;
            double priceForFishMenu = numberOfFishMenus * fishMenu;
            double priceForVegMenu = numberOfVegMenus * vegMenu;

            double priceForAllMenus = priceForChickenMenu + priceForFishMenu + priceForVegMenu;
            double priceForDesert = priceForAllMenus * 0.2;

            double allSum = priceForAllMenus + priceForDesert + deliveryPrice;

            Console.WriteLine(allSum);
        }
    }
}