Answer:
252 in^2
Explanation:
First break down the figure into composite shapes so you can use basic formula like (l)(w). Once you do that you should get 4 rectangles: (9)(15), (3)(4), (4)(9) and (3)(15). You take 3 away from the 12 because if you did (12)(15) you'd count a portion of the shape twice.
Once you find all the areas, add them to get 252 in^2