A café in France has found a way to encourage politeness.

The more polite you are, the less you have to pay for your coffee.

A cup of coffee at La Petite Syrah cafe costs a whopping €7 (seven Euros, or more than $10).

However, you can bring the price down if you’re nice to the server.

If you say please when you order (or s’il vous plait in French) the price comes down to €4,25 (about $6.18).

And if you say hello as well (“bonjour, un café, s’il vous plait”) the price comes down to a much more reasonable €1,40 (just over $2).