Bonus Score

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bonus_Score
{
    class Program
    {
        static void Main(string[] args)
        {
            var bonus = Double.Parse(Console.ReadLine());

            var bonusScore = 0.0;

            if (bonus <= 100)
            {
                bonusScore = 5;
            }
            else if (bonus > 100 && bonus < 999)
            {
                bonusScore = (bonus * 20) / 100;
            }
            else if (bonus > 1000)
            {
                bonusScore = (bonus * 10) / 100;
            }

            if (bonus % 10 == 5)
            {
                bonusScore += 2;
            }
            else if (bonus % 2 == 0)
            {
                bonusScore += 1;
            }
            Console.WriteLine(bonusScore);
            Console.WriteLine(bonus + bonusScore);
        }
    }
}