Why do gas stations charge 9/10ths of a cent, and how do they even take that out of your bank account?

Question

Why do gas stations charge 9/10ths of a cent, and how do they even take that out of your bank account?

In: Other

Answer 1

Over here we have some with .7 at the end of their prices to make them cheaper when sorted by price.

It rounds when the payment processes since you are buying fractions of the volume anyway, and it seems that most people are still choosing amounts to buy rather than just filling up because of the way discounts work so it gets charged the exact amount that they buy less the discount, no fractional cents there.