Hyo Jin bought a refrigerator for $1624.99, and the clerk worked out the sales tax as exactly $142.186625. Rounded to the nearest penny, how much sales tax does she actually hand over?

1. A penny is one hundredth of a dollar, so round the tax to the hundredths place. 2. Locate the hundredths digit of 142.186625, which is the 8, and underline the digit to its right, which is 6. 3. Since 6 is 5 or greater, add 1 to the 8, making it 9, and delete everything to its right. 4. The tax rounds to $142.19. 5. Simply chopping off the extra digits gives $142.18, which breaks the rounding rule because the next digit was 6. _Source: OpenStax Prealgebra (CC BY 4.0), Ch 5 "Decimals", section 5.1 Decimals_