[gyardley]

If I ran a large business, I would certainly look at the most-common purchases and combinations of purchases (especially low-cost items, like a candy bar) and consider tweaking prices so I gained rather than lost two pennies on my most common transactions.

Places with limited and standardized menus, like fast-food restaurants, could do this quite easily.

Enough businesses do this, and things no longer even out over time.

[prawn]

To the point where the less-privileged suffer significantly? It's not as though rounding up a bit is going to be the only way businesses try to squeeze out more money.