ShopQueue

namespace ShopQueue
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int shopBalance = 0;

            Queue<int> purchase = new Queue<int>();

            FillQueue(purchase);
            shopBalance = SellProduct(purchase, shopBalance);
            ShowShopBalance(shopBalance);
        }

        static void ShowShopBalance(int shopBalance)
        {
            Console.WriteLine($"Средств на балансе магазина - {shopBalance}");
        }

        static void FillQueue(Queue<int> queue)
        {
            Random random = new Random();

            int maxNumbersPurchase = 20;
            int minNumbersPurchase = 1;
            int maxCostPurchase = 2000;
            int minCostPurchase = 1;

            int purchaseNumbers = random.Next(minNumbersPurchase, maxNumbersPurchase + 1);

            for (int i = 0; i < purchaseNumbers; i++)
            {
                queue.Enqueue(random.Next(minCostPurchase, maxCostPurchase));
            }
        }

        static int SellProduct(Queue<int> queue, int shopBalance)
        {
           while(queue.Count > 0)
            {
                ShowQueueInfo(queue);
                Console.WriteLine($"На балансе {shopBalance}.");
                shopBalance += queue.Dequeue();
                Console.ReadKey();
                Console.Clear();
            }

           return shopBalance;
        }

        static void ShowQueueInfo(Queue<int> queue)
        {
            Console.WriteLine("Стоимость каждой покупки в очереди");

            foreach (int pricePurchse in queue)
            {
                Console.Write(pricePurchse + "||");
            }

            Console.WriteLine();
        }
    }
}