public virtual decimal Total { get
        {
           return SubTotal + TaxTotal;
        } }
        public virtual decimal TaxTotal { get
        {
           return _lineItems.Where(ticketLineItem => ticketLineItem.Item.IsTaxable).Sum(ticketLineItem => (ticketLineItem.Total * Lease.County.TaxRatePercent));
        } }
        public virtual decimal SubTotal
        {
            get
            {
               return _lineItems.Sum(x => x.Total);
            }
        }