/// <summary>
/// Recalculates the total, subtotals, and shipping costs.
/// </summary>
public void ReCalculate()
{
// No need to calculate if nothing was changed
if (!_isDirty)
{
return;
}
_subTotal = 0.0;
_shipping = 0.0;
foreach (ShoppingCartItem item in _items)
{
_subTotal += item.UnitPrice * item.Quantity;
_shipping += _shippingStrategy.EstimateShipping(item.UnitPrice, item.Quantity);
}
// Add subtotal and shipping to get total
_total = _subTotal + _shipping;
_isDirty = false;
}
