I need help pleaseeeee this is due tomorrow

Another way of finding Surface Area is
L= Length
W= Width
H= Height
the answer, and explained, would be this
2. SA= 2(12)(10)+2(12)(16)+2 (10)(16)
(multiply)
3. SA= 240 + 384 + 320
(add)
The answer is..
SA=944ft3