Answer
$$Cost = \$ 89,847$$
Work Step by Step
The area of the rectangle without the circle included is the same as the area of the second level. This area is 7587 square feet. The area of the circle is:
$$ A = \pi \times r^2 \\ A = \pi (30ft)^2 \\ A = 2826 \ ft^2$$
Thus, the total cost for flooring is:
$$ Cost= (2826)(13) +(7587)(7) \\ Cost = \$ 89,847$$
