Need help ASAP. First drop down is
-4) 1/4) 4) -1/4)

Second drop down is
-2) 2) 4) -4)

Third drop down is
4) -2) -4) 2)

Well an average of 364, but possibly 252 if you are especially eager. 

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !