/// <summary>
/// 結帳
/// </summary>
public void CheckOut()
{
Console.WriteLine($"【{Discount.GetMarketingProgramName()}】商品總金額: {Amount} 總付款金額: {Discount.Calculate(Amount)}");
}
public decimal ActualCost()
{
return((BillAmount - discount.Calculate(this))
+ extracharge.Calculate(this));
}
public decimal ActualCost()
{
return(BillAmount - _discount.Calculate(this) + _extraCharge.Calculate(this));
}
public virtual decimal TotalBill()
{
return(TotalPurchase + _tax.Calculate() - _discount.Calculate() + _delivery.Calculate());
}