Add Bags

using System;

namespace AddBags
{
    class Program
    {
        static void Main(string[] args)
        {
            double priceOver20kg = double.Parse(Console.ReadLine());
            double bagWeight = double.Parse(Console.ReadLine());
            int dayBefore = int.Parse(Console.ReadLine());
            int bagCount = int.Parse(Console.ReadLine());

            if (bagWeight < 10)
            {
                priceOver20kg /= 5;
            }
            else if (bagWeight <= 20)
            {
                priceOver20kg /= 2;
            }

            if (dayBefore < 7)
            {
                priceOver20kg *= 1.4;
            }
            else if (dayBefore <= 30)
            {
                priceOver20kg *= 1.15;
            }
            else if (dayBefore > 30)
            {
                priceOver20kg *= 1.1;
            }

            double total = priceOver20kg * bagCount;

            Console.WriteLine($" The total price of bags is: {total:f2} lv. ");
        }
    }
}