using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    static int sumPrices(IEnumerable<int> prices) 

    {

        return prices.Sum();

    }

​

    static void Main()

    {

        string[] args = {"100", "50", "200", "350"};

        int total = sumPrices(args.Select(int.Parse));

        Console.WriteLine(total);

        //Console.ReadKey();

    }

}