I took the photo on the right (click to enlarge) with my BlackBerry’s camera (so please forgive its being somewhat blurry) at the local Whole Foods store. It depicts an incredibly good sale price on some one-quart packages of almond milk:
Sale! 3 for $6.00
Regularly $1.99 [each]
The unit pricing helpfully tells us that 3 one-quart boxes for 6 dollars makes it $2.00 per quart. We don’t need the unit pricing to compute that the regular, non-“Sale!” price comes to $1.99 per quart.
One wonders whether it’s possible to decline the sale price at the register.
 Yes, that’s “unbelievable” as in not believable, and “incredible” as in not credible.