Orchid wants to retile her bathroom floor, which has an area of 40 square feet. She is deciding between two types of custom tiles. The square tile is 1 half foot by 1 half foot and costs 0 point 4 5 dollars per tile. The rectangular tile is 2 feet by 1 fourth foot and costs 0 point 8 0 dollars per tile. Which tile should Orchid choose to minimize costs? Explain.