What is surface area of the figure below, in square inches?

Answer:
Surface area is 310
Step-by-step explanation:
To find the surface area, you must find the area of all shapes (sides/surfaces) and add them together.
Answer:
325 sq. inches
Step-by-step explanation:
First I started with the triangles, which is 7 times 5. Triangles are half of rectangles and squares. So 35 divided by 2 is 17.5, but since there is two triangles, so we would keep the 35.
For the sides are 12 times 10 is 120, and there is two sides so 120 +120=240.
Last is the 5 times 10 = 50.
50 + 240 + 35 = 325
So the answer is 325 sq. ft.
Correct if I'm wrong please!!!
Thank you
Tisa