Answer:
Boxes from top to bottom 
Sides
6
6
12
52
Step-by-step explanation:
1) Split the prism into individual sides.
2) Find the area of each side by multiplying length by height.
3) Add the areas together.
     Since this is a rectangular prism; the top & bottom of the box will have the same area. Same with the other sides. 
     The top of the box is 2 by 3 making the area 6 times 2 for the bottom is 12
     The left and right sides are 3 by 4  A = 12 times 2    24
     The front and back are 2 by 4  A=8 times 2              16
     24 + 16 + 12