Hello!
First of all, let's find the area of the bases. We can see that the base is 8 by 6, or 48. We have this onto the top as well. This gives us 96. We can multiply The area of each side (base,front, side) by two to get the other side. Then we will add.
48(2)=96 (Base)
42(2)=84 (Side)
56(2)=112 (Front)
Now we add all of our numbers up.
96+84+112=292
Therefore, our answer is B) 292 in²
I hope this helps!