Using Units in Problem Solving, Modeling Practice Test

In the formula for pressure, $P=\dfrac{F}{A}$, force $F$ is measured in newtons (N) and area $A$ is measured in square meters ($\text{m}^2$). What are the units of $P$?

A taxi charges a base fee of $\$3.50$ plus $\$2.00$ per mile. The distance is measured in miles. Which expression has correct units for the total cost $C$ (in dollars) for $d$ miles?