ShoppingCart

using System;
using System.Collections.Generic;
using System.Linq;

namespace Lists
{
    class Program
    {
        static void Main(string[] args)
        {
            SortedDictionary<string, double> shopCart = new SortedDictionary<string, double>();
            double total = 0;
            while (true)
            {
                string command = Console.ReadLine();
                if (command == "STOP SHOPPING")
                {
                    break;
                }
                string[] input = command.Split('-').ToArray();
                string product = input[0];
                double price = double.Parse(input[1]);
                total += price;
                if (shopCart.ContainsKey(product))
                {
                    shopCart[product] += price;
                }
                else
                {
                    shopCart.Add(product, price);
                }
            }

            foreach (var item in shopCart)
            {
                Console.WriteLine($"{item.Key}->{item.Value}");
            }
            Console.WriteLine($"{total:F2}");
        }
    }
}