Hi Lightworker:
On the back of the booklet you received, if the promotion is the same one I received about a month ago, there is a "Promotion" code. When you place your order, once you've begun it, there is a box for you to insert that code, then you "update" your selection and the web-site does the substraction calculation down to the "special" price. Also, there is the option of making three payments instead of one large one - there's a little box you check just above. Just in case that helps too.
Cheers!
Sheila 
