Solve the Problem $c = 36 \sqrt { n } + 49$

Solve the problem.
-A retailer finds that total cost per day is given by $c = 36 \sqrt { n } + 49$ dollars, where $c$ is cost and $n$ is the number of units sold. What is $c$ when 64 units are sold?

A) $\$ 337$
B) $\$ 55$
C) $\$ 295$
D) $\$ 2353$