The shop will. It can be a lot of money in aggregate. It also creates really pathological purchasing incentives, where spreading out large purchases over several small purchases can yield significant savings for the purchaser.
There's one exceedingly simple answer:
Keep the penny (possibly a new one that is cheaper to make).
We're basically breaking into jail on this one, creating more problems than we're solving.
Hi from Argentina! Here we unofficially deprecated the AR$10, AR$20 and AR$50 bill, so the smallest one is the AR$100 bill (~US$0.07). Every price include taxes.
What are they selling? Candies one by one? Inside the candy store everything is rounded to a multiple of AR$100. A single candy is AR$100. You many get an offer of 3 candies for AR$200, or 2 small candies for AR$100, or other fancy candies in packages of 13 for AR$1000. Everything else is more expensive, like AR$700 or more, but all multiples of AR$100.
The photocopy shop near my home has a copy for AR$120. They usually sell many copies, so a 20% is relevant. They have a stash of AR$20, but it's probably the only shop nearby. I also collect the AR$20 just to pay the photocopies, just to be nice to avoid finishing their stash and also because I don't know what to do with the AR$20.
I guess a single apple is probably a problem. It cost like AR$400-AR$500 depending on the weight. Someone very smart can learn to choose and apple with the exact weight to get a AR$499 apple and pay AR$400 :) Luckily inflation changes the price so it's difficult to learn. Also AR$499 will be illegaly rounded to AR$500. And most people will buy more than 1 apple, let's say that the total is AR$10,000 and AR$100 is only a 1% that is lower than the spoilage of rotten fruit.
The other direction avoids a lot of stupid complains. Nobody will complain if the shop gives them a $0.04 gift.
The shop will. It can be a lot of money in aggregate. It also creates really pathological purchasing incentives, where spreading out large purchases over several small purchases can yield significant savings for the purchaser.
There's one exceedingly simple answer:
Keep the penny (possibly a new one that is cheaper to make).
We're basically breaking into jail on this one, creating more problems than we're solving.
Hi from Argentina! Here we unofficially deprecated the AR$10, AR$20 and AR$50 bill, so the smallest one is the AR$100 bill (~US$0.07). Every price include taxes.
What are they selling? Candies one by one? Inside the candy store everything is rounded to a multiple of AR$100. A single candy is AR$100. You many get an offer of 3 candies for AR$200, or 2 small candies for AR$100, or other fancy candies in packages of 13 for AR$1000. Everything else is more expensive, like AR$700 or more, but all multiples of AR$100.
The photocopy shop near my home has a copy for AR$120. They usually sell many copies, so a 20% is relevant. They have a stash of AR$20, but it's probably the only shop nearby. I also collect the AR$20 just to pay the photocopies, just to be nice to avoid finishing their stash and also because I don't know what to do with the AR$20.
I guess a single apple is probably a problem. It cost like AR$400-AR$500 depending on the weight. Someone very smart can learn to choose and apple with the exact weight to get a AR$499 apple and pay AR$400 :) Luckily inflation changes the price so it's difficult to learn. Also AR$499 will be illegaly rounded to AR$500. And most people will buy more than 1 apple, let's say that the total is AR$10,000 and AR$100 is only a 1% that is lower than the spoilage of rotten fruit.