Куриер Експрес : Courier Express

using System;

namespace tESt
{
    class Program
    {
        static void Main(string[] args)
        {
            var weight = double.Parse(Console.ReadLine());
            var typeDelivery = (Console.ReadLine().ToLower());
            var km = int.Parse(Console.ReadLine());

            double costs = 0;

            if (typeDelivery == "standard")
            {
                if (weight < 1)
                {
                    costs =  km * 3;
                }
                else if (weight <= 10)
                {
                    costs =  km * 5;
                }
                else if (weight <= 40)
                {
                    costs =  km * 10;
                }
                else if (weight <= 90)
                {
                    costs =  km * 15;
                }
                else if (weight <= 150)
                {
                    costs =  km * 20;
                }
                else
                {
                    Console.WriteLine("Error!");
                }
            }
            else
            {
                if (weight < 1)
                {


                    costs = km * 3 +  (  weight * km * (3 * 0.80) );  // 80%



                }
                else if (weight <= 10)
                {
                    costs =  km * 5 + (  weight * km * (5 * 0.40));   // 40%
                }



                else if (weight <= 40)
                {
                    costs =  km * 10 + ( weight * km * (10 * 0.05)); // 5%
                }


                else if (weight <= 90)
                {
                    costs =  km * 15 + ( weight * km * (15 * 0.02));     // 2%
                }
                else if (weight <= 150)
                {
                    costs = km * 20 + ( weight * km * (20 * 0.01)); // 1%
                }
                else
                {
                    Console.WriteLine("Error!");
                }
            }

            costs = costs / 100.0;  // money 0.00

            Console.WriteLine($"The delivery of your shipment with weight of {weight:f3} kg. would cost {costs:f2} lv.");

        }
    }
}