system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: Stores should mark the full price of goods on the shelf.

This was something that really annoyed me when i visited America being charged a difference price to what was on the shelf for goods. I think that stores should include tax on the shelf price for items they sell, it's ridiculous that stores can advertise a product at a certain price and charge another for it. It means that customers have to do the calculations themselves rather than by themselves, and because stores usually like to advertise products at a nice round number, the product usually ends up actually costing a less convenient number.

For example a soda might be $2.99 on the shelf and really cost $3.14 giving you 76 cents in coin change rather than 1c. (Also fuck pennies but I think people won't disagree on that.)

Please change my view and explain what this systems benefits are.
gpt
This system allows businesses with multiple locations to have standardized prices.  This is good fit the business, because it makes labeling inventory easier, and it means they don't have to spend time re-labeling their inventory if the tax rate changes.

It also means that there's less internal competition between nearby locations of the same business.  People are more likely to go to the location with lower sales tax if the list price of the item is lower.  This makes it harder for businesses to justify having multiple nearby locations, and will cut tax revenue from areas with higher sales tax.