please help quickly I have 30 mins When Chiko opens a cereal box and lays it out flat, she sees that the top and the bottom of the box each measure 8 centimeters by 21 centimeters, the sides of the box each measure 8 centimeters by 29 centimeters, and the front and back of the box each measure 21 centimeters by 29 centimeters. What is the surface area of Chiko's cereal box?