Ineed with 6 my question is that what is if her estimate is reasonable and show work i you have to

Her estimate is close so I guess she's reasonable.Here's my work:
Formula for surface area of a rectangular prism is: A=2(wl+hl+hw)
w=6     h=8    l=13.2
A=2(6×13.2+8×13.2+6×8)
A=2(79.2+105.6+48)
A=2(232.8)
A=465.6ft²

The answer would be b ! explanation: the formula for sa *surface area * is 2×l×w+2×l×h+2×w×h so in this case l=4w=12h=8so you use the formula to solve it and it give you the answer of 352^cm^2