Answer
$$C = 205 \text{ dollars per square foot}$$
Work Step by Step
Using the areas for the first and second floors calculated in problems 37 and 38, we find that the total area is:
$$A=7587\ ft^2 + 10,413 \ ft^2 \\ A = 18000 \ ft^2 $$
Thus, the cost per square foot is:
$$ C= \frac{\$3,698,700}{18000} \\ C = 205 \text{ dollars per square foot}$$
