Pitt Jones Company Had the Following Activities, Allocated Costs, and Allocation

Pitt Jones Company had the following activities, allocated costs, and allocation bases:
$$\begin{array} { | l | l | l | } \hline \text { Activities } & \text { Allocated Costs } & \text { Allocation Base } \\\hline \text { Account inquiry (hours) } & \$ 60,000 & 2,000 \text { hours } \\\hline \text { Account billing (lines) } & \$ 30,000 & 20,000 \text { lines } \\\hline \text { Account verification (accounts) } & \$ 15,000 & 20,000 \text { accounts } \\\hline \text { Correspondence (letters) } & \$ 10,000 & 1,000 \text { letters } \\\hline\end{array}$$ The above activities are used by departments P and Q:
$$\begin{array} { | l | l | l | } \hline & \text { Department P } & \text { Department Q } \\\hline \text { Account inquiry (hours) } & 100 \text { hours } & 200 \text { hours } \\\hline \text { Account billing (lines) } & 10,000 \text { lines } & 7,000 \text { lines } \\\hline \text { Account verification (accounts) } & 1,000 \text { accounts } & 600 \text { accounts } \\\hline \text { Correspondence (letters) } & 50 \text { letters } & 100 \text { letters } \\\hline\end{array}$$ What is the cost per driver unit for the account billing activity?

A) $1.50
B) $30.00
C) $1.60
D) $1.43