using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main(string[] args)

    {

        Dictionary<char, decimal> Letters = new Dictionary<char, decimal>()

        {{'A', 1.5m}, {'C', 3.9m}, {'R', 3.1m}, };

        decimal result = 0;

        string input = "CAR";

        foreach (char item in input)

        {

            if (Letters.ContainsKey(char.ToUpper(item)))

            {

                result += Letters[item];

            }

        }

​

        Console.Write(result);

    }

}