Consumers have the opportunity to buy a product, perhaps with a coupon or discount. P is called the discount factor function or the zero coupon bond. Also included was a US$5 rebate coupon for the four-CD box set. The vinyl LP also comes with a free MP3 download coupon. Each digital coupon or ticket is known as a "pass". Each CD came with a special coupon. On older paper tickets, it was highlighted on the relevant coupon for that flight. This entails verifying certain attributes, such as credit rating and coupon/spread, of each collateral security. The coupon (i.e. interest payment) is usually taxable for the investor. This creates a supply of new zero coupon bonds. The front of each coupon is printed in French. Businesses that advertised in Drew's coupon book business were also shunned. Barbados didn't fulfill its obligation to pay the 26th coupon on Eurobonds maturing in 2035. For overseas purposes, an international reply coupon is used instead. Approximately 14,000 businesses mailed in the coupon and the territory's foreign industry increased.