public void Calculate(IDiscountRules discountRules)
{
var discount = discountRules.GetDiscount(this);
DiscountAmount = discount.Amount;
TotalAmount = Product.Price * Quantity - DiscountAmount;
}
public Order(string companyName, IDiscountRules discountRules, ITaxCalculator taxCalculator)
{
CompanyName = companyName;
this.discountRules = discountRules;
this.taxCalculator = taxCalculator;
}
