480 units, because
Y × X = 65
X × Z = 104
Y × Z = 40
You multiple each answer by 2 because there are 2 sides(of the same size) on the shape.
Y × X = 65
X × Z = 104
Y × Z = 40
You multiple each answer by 2 because there are 2 sides(of the same size) on the shape.