Amazon may have an error on this product because there is a 20% off on certain Chemical Guys products. On this one in particular, if you select Subscribe & Save, the 20% off gets applied TWICE along with the 15% off for Subscribe & Save. Which brings the cost from the regular price of $26.99 down to $13 and change depending if you get sales tax added.
I checked some of the other Chemical Guys products and none of the others work this way.
First time posting. Not sure if I did this right. Happy Shopping.
edit: apparently this is only working for me. sorry. I thought this was an excellent deal.