using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        bool condition = true;

        List<double> manaToSave = new List<double>();

        if (condition)

        {

            manaToSave.Add(250);

        }

        else

        {

            manaToSave.Remove(250);

        }

​

        if (condition)

        {

            manaToSave.Add(450);

        }

        else

        {

            manaToSave.Remove(450);

        }

​

        if (condition)

        {

            manaToSave.Add(130);

        }

        else

        {

            manaToSave.Remove(130);

        }

​

        if (condition)

        {

            manaToSave.Add(70);

        }

        else

        {

            manaToSave.Remove(70);

        }

​

        var total = manaToSave.Sum();

        Console.WriteLine(total);

    }

}