To find the surface area, we must find the area of each shape.
There are four (4) rectangles: their lengths are 5; their widths are 3.
The formula for the area of a rectangle is length times width.
5 times 3 = 15.
Since there are 4 rectangles total, we can multiply 15 by 4.
15 times 4 is 60.
Next, we have two (2) squares.
The dimensions of the square are 3 by 3.
3 times 3 is 9.
Since we have 2 squares, we can multiply the area of 1 square, 9, by 2.
9 times 2 is 18.
So, the areas of the rectangles are 60, and the areas of the squares are 18.
60 + 18 = 78.
So, the final answer is 78.