Business Reply July 10, 1996February 6, 2017 You’ve seen the little notice charities stick on their postage-free envelopes. In one variation or another, it reads: “Your stamp HERE helps us even more!” But did you know how much? Putting your own 32-cent stamp there saves The Whales (or whomever) 76 cents. [10/96: WRONG! Mike Wyson of ZPG says it’s usually just 2 cents extra, worst-case 10 cents. And they’re charged the 2 cents anyway, so the stamp really saves only 30 cents.] So you can give an extra 76 cents at a cost to you of just 32 cents. That’s an instant 143% “return” on your added social (or cetacean) investment. Tomorrow: Forget the Whales — Save $125