most valuale customer

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

namespace _04LinqMoreExcercisesMostValueableCustomer
{
    class Program
    {
        static void Main(string[] args)
        {

            string input =Console.ReadLine();

            Dictionary<string, decimal> products = new Dictionary<string, decimal>();

            Dictionary<string, List<string>> Byers = new Dictionary<string, List<string>>();


            while(input!="Shop is open")
            {

                string[] inputTokens = input.Split(' ').ToArray();
                string product = inputTokens[0];
                decimal price = decimal.Parse(inputTokens[1]);


                products.Add(product,price);

                input = Console.ReadLine();

            }

            // half input done
            //  Console.WriteLine("halfway input done");


            input = Console.ReadLine();

            while (input!="Print")
            {

                if (input != "Discount")
                {
                    string[] boughtProducts = input.Split(new string[]{": ",", "},StringSplitOptions.RemoveEmptyEntries).ToArray();

                    string boughtItem = String.Empty;
                    string Name = boughtProducts[0];
                    Byers.Add(Name, new List<string>());
                    for (int i = 1; i < boughtProducts.Length; i++)
                    {
                        boughtItem = boughtProducts[i];
                        Byers[Name].Add(boughtItem);
                    }

                }
                else

                {
                  List<KeyValuePair<string,decimal>>topthree=  products.OrderByDescending(x => x.Value).Take(3).ToList();

                    foreach (KeyValuePair<string,decimal> pair in topthree)
                    {
                        string name = pair.Key;
                        decimal sum= pair.Value;

                        products[name] =sum -(sum* 0.10M);
                    }

                }


                input = Console.ReadLine();
            }

            // logic done left to do output
            // Console.WriteLine("discount done");

            Dictionary<string, decimal> bestbyer = new Dictionary<string, decimal>();

            string bestOne =string.Empty;


            foreach (var pair in Byers)
            {
                decimal total = 0;
                bestOne = pair.Key;
                List<string> boughtProducts = pair.Value;

                foreach (string product in boughtProducts)
                {

                 total += products[product];

                }

                bestbyer.Add(bestOne, total);
            }

            // fucking calculations done stupid split options and white spaces!
            // Console.WriteLine("done?!?");
            foreach (KeyValuePair<string,decimal> pair in bestbyer.OrderByDescending(x=>x.Value).Take(1))
            {
                string name = pair.Key;
                Console.WriteLine($"Biggest spender: {pair.Key}");
                Console.WriteLine("^Products bought:");

                List<string> items = Byers[name].Distinct().ToList()

                Dictionary<string, decimal> itemsFinal = new Dictionary<string, decimal>();

                for(int k=0;k<items.Count;k++)
                {
                itemsFinal[items[k]]=products[items[k]];
                }

               foreach (var product in itemsFinal.OrderByDescending(x=>x.Value))
               {
               Console.WriteLine($"^^^{product.Key}: {product.Value:f2}");
               }
               Console.WriteLine("Total: {0:f2}",pair.Value);

            }
          // fucking done nightmare!




        }
    }
}