Bottom side: rectangle = 29 x 30
Top side: rectangle = 12 x 30
Right side: rectangle = 30 x 26
Left side: rectangle = 30 x 25
Front side: trapezoid = ½ x 24 x (29 + 12)
Back side: trapezoid = ½ x 24 x (29 + 12)
Calculate the individual areas and add them together.