Discount items added before date

This script will apply a 15% discount to items added to FillZ prior to July 2006. Date 2006-07-01 (yyyy-mm-dd) can be changed as needed.

discount = 0.15;
price = item.basePrice;
openDate = item.open_date;

if (openDate < '2006-07-01') {
  return price * (1 - discount);
}