YMMV: Worked in SLC, UT. Coming in late but wanted to share for those who can make it before midnight:
So I went in and got a Dyson V7 which was regularly priced $449 but showed reduced price $399. The store associate said its 40% on $339 ($239+tax). I head up to the billing counter and they ring up $269+tax. I informed them that the store associate said 40% off on $399 and the billing clerk made a call to confirm while the queue behind me builds up. After 3-4 mins the billing clerk honored the 40% off on $399 and also gave in some more discount bringing the whole bill down to $193 (with tax). This just made my day!!