We assume the material has the same thickness for sides and bottom. In that case, the problem is the same as minimizing the surface area of the box. (See https://brainly.com/question/9600476 for a discussion of this problem in general.)
The dimensions of the edge of the base are
∛(2×8788 ft³) = 26 ft
The box is 26 ft square and 13 ft high.
