Chicago's combined sales tax is 10.25%.
So, a subtotal of $18.29 would end up costing $18.29 * 1.1025 = $20.1647, which would get rounded down to $20.16, right? A subtotal of $18.30 would end up costing $18.30 * 1.1025 = $20.1757, which would get rounded up to $20.18, right?
Is this correct, given Chicago's sales tax? If it is, what would be a loophole for getting a receipt totaling $20.17?