why though? as a worker you should know that it's a mistake and be a part of the effort to get it changed immediately. Blah blah we get it you wanna benefit yourself but you're doing no favors to anyone else, especially the cashier, if you try to get the false price IF and only if the advertisement is wrong. I've had a flow team member try exactly what you want to do when I cashiered and she was embarrassed when the STL himself checked, came and found our check-lane, and told her himself "no"
In the end, it's up to the GSTL, we do not always honor sale price if it is advertised wrong. Is that wrong? Maybe, but it's a mistake that we can't honor. Someone from flow team had stocked a bunch of wipes in it's casestock instead of the stocking the eaches inside of it, lady brought it up expecting to buy 6 packs of wipes for $1.39. I said no at first, but told her I could get a GSTL, GSTL comes, says he can't honor that, guest wants to see HIS manager, he gets LOD, LOD tells her "Sorry, that is our mistake, I admit it, but we cannot sell you 6 packs for only $1.39" and the guest gets all huffy and puffy "What can you do to reprimand me for this mistake?" and LOD says "Nothing."
Just don't expect too much, and you can't act surprised when you get passive-aggressive comments from fellow cashiers and guest service TMs, they're the ones who deal with this kind of shit daily lol