01. Christmas Sweets

using System;

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            double priceBaklava = double.Parse(Console.ReadLine());
            double priceMufin = double.Parse(Console.ReadLine());
            double priceShtolen = 0;
            double priceBonboni = 0;
            double priceBiskviti = 0;

            double howMuchShtolen = double.Parse(Console.ReadLine());
            double howMuchBonboni = double.Parse(Console.ReadLine());
            int howMuchBiskviti = int.Parse(Console.ReadLine());

            priceShtolen = 1.6 * priceBaklava;
            priceBonboni = 1.8 * priceMufin;
            priceBiskviti = 7.5;

            double all = priceBiskviti*howMuchBiskviti + priceBonboni*howMuchBonboni + priceShtolen* howMuchShtolen;
            Console.WriteLine($"{all:F2}");


        }
    }
}