Очередь в магазине

using System;
using System.Collections.Generic;

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

        int sumPurchase = 0;
        int minPurchase = 100;
        int maxPurchase = 10000;
        int minBuyers = 1;
        int maxBuyers = 11;

        int countBuyers = ReturnRandomNumber(minBuyers, maxBuyers);

        for (int i = 0; i < countBuyers; i++)
        {
            buyers.Enqueue(ReturnRandomNumber(minPurchase, maxPurchase));
        }

        for (int i = 0; i < buyers.Count; i++)
        {
            sumPurchase += buyers.Dequeue();
        }

        Console.WriteLine($"Сегодня было {countBuyers} покупателей и они купили на {sumPurchase} рублей.");
        Console.ReadKey();
    }

    static int ReturnRandomNumber(int minNumber, int maxNumber)
    {
        Random random = new Random();

        int number = random.Next(minNumber, maxNumber);

        return number;
    }
}