An open-top rectangular box is being constructed to hold a volume of 400 in. The base of the box is made from a material casting 7 conts/in. The front of the box must be decorated, and will cost 12 cents/in. The remainder of the sides will cost 4 cents/in /in. Find the dimensions that will minimize the cost of constructing this box. Front width: Depth: Height: in. in. in.