system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why don't gas stations just raise the price of gas 1/10th of a cent to make it an even number?
gpt
The same reason everything in stores is 3.99 instead of $4.00 - psychology. Your brain sees 3 instead of 4 and it seems smaller, even though it's literally 0.25% different. With gas, 2.99 9/10 seems cheaper than 3.00, so you're more likely to buy.