/// <summary>
        /// Get a formatted bestsellers total amount
        /// </summary>
        /// <param name="searchModel">Bestseller search model</param>
        /// <returns>Bestseller total amount</returns>
        public virtual string GetBestsellerTotalAmount(BestsellerSearchModel searchModel)
        {
            if (searchModel == null)
            {
                throw new ArgumentNullException(nameof(searchModel));
            }

            //get parameters to filter bestsellers
            var orderStatus   = searchModel.OrderStatusId > 0 ? (OrderStatus?)searchModel.OrderStatusId : null;
            var paymentStatus = searchModel.PaymentStatusId > 0 ? (PaymentStatus?)searchModel.PaymentStatusId : null;

            if (_workContext.CurrentVendor != null)
            {
                searchModel.VendorId = _workContext.CurrentVendor.Id;
            }
            var startDateValue = !searchModel.StartDate.HasValue ? null
                : (DateTime?)_dateTimeHelper.ConvertToUtcTime(searchModel.StartDate.Value, _dateTimeHelper.CurrentTimeZone);
            var endDateValue = !searchModel.EndDate.HasValue ? null
                : (DateTime?)_dateTimeHelper.ConvertToUtcTime(searchModel.EndDate.Value, _dateTimeHelper.CurrentTimeZone).AddDays(1);

            //get a total amount
            var totalAmount = _orderReportService.BestSellersReportTotalAmount(
                showHidden: true,
                createdFromUtc: startDateValue,
                createdToUtc: endDateValue,
                os: orderStatus,
                ps: paymentStatus,
                billingCountryId: searchModel.BillingCountryId,
                vendorId: searchModel.VendorId,
                categoryId: searchModel.CategoryId,
                manufacturerId: searchModel.ManufacturerId,
                storeId: searchModel.StoreId);

            return(_priceFormatter.FormatPrice(totalAmount, true, false));
        }