03. Mobile Operator

using System;

namespace _2._Exam_Preparation
{
    class Program
    {
        static void Main(string[] args)
        {
            string time = Console.ReadLine();
            string type = Console.ReadLine();
            string mobileData = Console.ReadLine(); // "yes"/"no"
            int months = int.Parse(Console.ReadLine());

            double monthlyPrice = 0;

            switch (time)
            {
                case "one":
                    switch (type)
                    {
                        case "Small":
                            monthlyPrice = 9.98;
                            break;
                        case "Middle":
                            monthlyPrice = 18.99;
                            break;
                        case "Large":
                            monthlyPrice = 25.98;
                            break;
                        case "ExtraLarge":
                            monthlyPrice = 35.99;
                            break;
                    }
                    break;
                case "two":
                    switch (type)
                    {
                        case "Small":
                            monthlyPrice = 8.58;
                            break;
                        case "Middle":
                            monthlyPrice = 17.09;
                            break;
                        case "Large":
                            monthlyPrice = 23.59;
                            break;
                        case "ExtraLarge":
                            monthlyPrice = 31.79;
                            break;
                    }
                    break;
            }

            if (mobileData == "yes")
            {
                if (monthlyPrice <= 10)
                {
                    monthlyPrice += 5.50;
                }
                else if (monthlyPrice <= 30)
                {
                    monthlyPrice += 4.35;
                }
                else
                {
                    monthlyPrice += 3.85;
                }
            }

            double total = monthlyPrice * months;

            if (time == "two")
            {
                total -= total * 0.0375;
            }

            Console.WriteLine($"{total:f2} lv.");
        }
    }
}