Minimizing Packaging Costs A rectangular box is to have a square base and a volume of 20 ft3. If the material for the base costs $0.19/ft2, the material for the sides costs $0.06/ft2, and the material for the top costs $0.11/ft2, determine the dimensions (in ft) of the box that can be constructed at minimum cost. (Refer to the figure below.) // Q) : ft >