queue at the store(1)

using System;
using System.Collections.Generic;

namespace ConsoleApp3
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Queue<int> clientsQueue = new Queue<int>();

            CreateQueue(clientsQueue);
            ServQueue(clientsQueue);
        }

        static void CreateQueue(Queue<int> clientsQueue)
        {
            int numberClients = 10;
            int maxValue = 21;
            int minValue = 10;
            Random random = new Random();

            for (int i = 0; i < numberClients; i++)
                clientsQueue.Enqueue(random.Next(minValue, maxValue));
        }

        static void PrintQueue(Queue<int> clientsQueue)
        {
            Console.Write("Очередь клиентов: ");

            foreach (var client in clientsQueue)
                Console.Write(client + " ");

            Console.WriteLine();
        }

        static void ServQueue(Queue<int> clientsQueue)
        {
            int totalCost = 0;

            while (clientsQueue.Count > 0)
            {
                PrintQueue(clientsQueue);

                Console.WriteLine("текущая стоимость покупок: " + totalCost);
                totalCost += clientsQueue.Peek();

                Console.WriteLine("следующая покупка: " + clientsQueue.Dequeue());
                Console.ReadKey();
                Console.Clear();
            }

            Console.WriteLine("полная стоимость покупок: " + totalCost);
        }
    }
}