public decimal getDiscountedPersonCost(decimal yearlyCost, IPerson person)
{
var discountedCost = yearlyCost;
var discounts = _discountHelper.GetApplicableDiscounts();
discounts.ForEach(d =>
{
discountedCost = discountedCost - d.GetDiscountAmount(yearlyCost, person);
});
return(discountedCost);
}