AMC8 2006 8, Problem 1

Mindy made three purchases for $\textdollar 1.98$ dollars, $\textdollar 5.04$ dollars, and $\textdollar 9.89$ dollars. What was her total, to the nearest dollar?

Solution: The three prices round to $\textdollar 2$, $\textdollar 5$, and $\textdollar 10$, which have a sum of $\fbox{17}$. We know that there will not be a rounding error, as the total amount rounded is clearly less than $\textdollar 0.50$.

Answer: 17