The surface area is 168 yd^2.
There are 2 rectangles with the dimensions of 6 by 2.
6 x 2 = 12, times 2 (since there are two equal ones) = 24.
There are 2 rectangles with the dimensions of 9 by 2.
9 x 2 = 18, x 2 = 36.
Lastly, there are two rectangles with the dimensions of 9 by 6.
9 x 6 = 54, x 2 = 108.
Now, we must add them all up.
24 + 36 + 108 =
168 (yards squared).