private void CreateOrder(HotcakesApplication app, DateTime timeOfOrder, string[] skus, int[] quantities = null,
                                 bool isPlaced = true)
        {
            var o = new Order {
                StoreId = app.CurrentStore.Id, TimeOfOrderUtc = timeOfOrder, IsPlaced = isPlaced
            };

            for (var i = 0; i < skus.Length; i++)
            {
                var qty = 1;
                if (quantities != null && i < quantities.Length)
                {
                    qty = quantities[i];
                }
                AddProductToCart(app, o, skus[i], qty);
            }
            app.CalculateOrderAndSave(o);

            // Place order
            o.IsPlaced = isPlaced;
            app.OrderServices.Orders.Update(o);

            if (isPlaced)
            {
                // Pay for order
                var pm = new OrderPaymentManager(o, app);
                pm.OfflinePaymentAddInfo(o.TotalGrand, "Cash");

                CashReceive(app, pm, o.TotalGrand, o);
            }
        }