Question 1084784
The surfaces are the bottom, and four sides.  There is no top side.


{{{18*15+18*10+18*10+15*10+15*10}}}

-

{{{18*15+2(18*10+15*10)}}}

{{{18*15+2(180+150)}}}

{{{18*15+660}}}

{{{930*squareInches}}}