Find the Unit Price $1 \frac{1}{2}$ -Lb Package of Seedless Grapes Costs

Find the unit price.
-A $1 \frac{1}{2}$ -lb package of seedless grapes costs $\$ 3.81$ . Round to the nearest hundredth of a dollar.

A) $\$ 5.72 / \mathrm{lb}$
B) $\$ 2.54 / \mathrm{lb}$
C) $\$ 0.16 / \mathrm{lb}$
D) $\$ 1.91 / \mathrm{lb}$