private void CalculateAmount()
{
int hours = ConvertDate.GetCheckInAndCheckOutTimes(EntryDate, departureDate);
if (typeof(Car).IsInstanceOfType(Vehicle))
{
Amount = (Vehicle as Car).CalculateAmountCar(hours);
}
else if (typeof(Motorcycle).IsInstanceOfType(Vehicle))
{
Amount = (Vehicle as Motorcycle).CalculateAmountMotorcycle(hours);
}
else
{
throw new CalculateAmountException();
}
}