If there is no tax, which of the following costs more than $\$ 18$ to purchase?

(A) Five $\$ 1$ items and five $\$ 2$ items

(B) Nine $\$ 1$ items and four $\$ 2$ items

(C) Nine $\$ 1$ items and five $\$ 2$ items

(D) Two $\$ 1$ items and six $\$ 2$ items

(E) Sixteen $\$ 1$ items and no $\$ 2$ items
The cost of nine $\$ 1$ items and five $\$ 2$ items is $(9 \times \$ 1)+(5 \times \$ 2)$, which is $\$ 9+\$ 10$ or $\$ 19$.

The correct answer is (C).

(We may check that each of the remaining four answers gives a cost that is less than $\$ 18$.)

ANsWER: (C)