using System;

public class Program

{

    public static void Main()

    {

        double produceWeight;

        double producePrice;

        double bagPrice;

        double bagCapacity;

        double totalCostofSale;

        double bagOverflow;

        double extraBag = 0;

        Console.WriteLine("Produce weight: ");

        produceWeight = Convert.ToDouble(Console.ReadLine());

        Console.Write("Price of produce: ");

        producePrice = Convert.ToDouble(Console.ReadLine());

        Console.Write("Bag Price: ");

        bagPrice = Convert.ToDouble(Console.ReadLine());

        Console.Write("Bag capacity: ");

        bagCapacity = Convert.ToDouble(Console.ReadLine());

        bagOverflow = produceWeight % bagCapacity;

        if (bagOverflow != 0)

        {

            extraBag = 1;

        }

        totalCostofSale = (Math.Ceiling((produceWeight / bagCapacity)) * bagPrice) + producePrice;

        Console.WriteLine("The total cost of the sale is: " + totalCostofSale );

    }

}