Which expression could be represented by the shaded parts of the model below? A 6 58 + 8 8 B 6 X 8 55 C D 8888 6 +5 + + + Three boxes are shipped on a truck. Each box has a base of 18 square feet. Two of the box have a height of 5 feet and one box has a height of 7 feet. What is the total volume, in cubic the three boxes?​