A manufacturer is making cylindrical cans with radius r and height h. Corporate says the volume of the cans must be 550 mL (i.e. cm) exactly. Corporate also says the base of the can should be made out of a "smart wifi-enabled" material that tracks consumer can use patterns. This material costs 2 times as much as the material used for the sides and top of the can. What are the dimensions r and h of the can that minimize the total cost.