Most Valued Customer

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

namespace _4.Most_Valued_Customer
{
    class Program
    {
        static void Main(string[] args)
        {
            var products = new Dictionary<string, decimal>();
            var customers = new Dictionary<string, Dictionary<string, decimal>>();
            string input = Console.ReadLine();
            var a = new List<string>();
            decimal sum = 0;
            while (input != "Shop is open")
            {
                string[] data = input.Split(' ');
                products[data[0]] = decimal.Parse(data[1]);
                input = Console.ReadLine();
            }

            input = Console.ReadLine();
            a.Add(input);
            while (input != "Print")
            {
                var sorteredProducts = products.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
                int count = 0;
                if (input == "Discount")
                {
                    foreach (var product in sorteredProducts)
                    {
                        decimal price = product.Value;
                        price *= 0.9m;
                        products[product.Key] = price;
                        count++;
                        if (count == 3) break;
                    }
                }
                input = Console.ReadLine();
                a.Add(input);
            }

            input = Console.ReadLine();
            for (int i = 0; i < a.Count; i++)
            {
                string[] data = a[i].Split(new string[] { ": ", ", " }, StringSplitOptions.RemoveEmptyEntries);
                if (data[0] == "Print")
                {
                    break;
                }
                if (!(data[0] == "Discount"))
                {
                    if (!customers.ContainsKey(data[0]))
                    {
                        customers.Add(data[0], new Dictionary<string, decimal>());

                        for (int j = 1; j < data.Length; j++)
                        {
                            if (!customers[data[0]].ContainsKey(data[j]))
                            {
                                customers[data[0]][data[j]] = 0m;
                            }
                        }

                        foreach (var product in products)
                        {
                            if (data.Contains(product.Key))
                            {
                                int count = 0;
                                foreach (var item in data)
                                {
                                    if (item == product.Key) count++;
                                }
                                customers[data[0]][product.Key] = product.Value * count;
                            }
                        }
                    }
                }
            }

            string customerName = string.Empty;
            decimal max = decimal.MinValue;
            foreach (var record in customers)
            {
                string name = record.Key;
                sum = 0;
                foreach (var item in record.Value)
                {
                    sum += item.Value;
                }
                if (max < sum)
                {
                    max = sum;
                    customerName = name;
                }
            }

            Console.WriteLine($"Biggest spender: {customerName}");
            Console.WriteLine("^Products bought:");
            var tempDictionary = new Dictionary<string, decimal>();
            var result = new Dictionary<string, decimal>();
            foreach (var item in customers[customerName])
            {
                tempDictionary[item.Key] = products[item.Key];
            }
            result = tempDictionary.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
            foreach (var item in result)
            {
                Console.WriteLine($"^^^{item.Key}: {products[item.Key]:F2}");
            }
            Console.WriteLine($"Total: {max:F2}");

        }
    }
}