> The computers are not dumb.

Nobody has suggested that they malfunction.

I thought this was obvious, but to spell it out: I was suggesting that they might not necessarily be programmed to apply a different price depending on quantity. An item might have a flat price of $1 each, but labeled on the shelf/bin as "special: five for $5" to encourage larger purchases.

I have personally encountered this. Meanwhile, I do not recall an example of buying a quantity smaller than suggested and being charged a higher price per item. Hence my question about labeling and law.

> Also, if you do not have a member/loyalty account, you do not get those discounts.

I'm not talking about membership discounts.