The dimensions of a trapezoidal prism are given in the following diagram (not drawn to scale). A trapezoidal prism consists of two trapezium faces and four rectangular faces. The trapezium face has edges of 10cm, 5cm and 18cm and height of 3cm. The bottom face has edges of 18cm and 8cm.

Find the surface area of the trapezoidal prism.
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: The dimensions of a trapezoidal prism are given in the following diagram (not drawn to scale). A trapezoidal prism consists of two trapezium faces and four rectangular faces. The trapezium face has edges of 10cm, 5cm and 18cm and height of 3cm. The bottom face has edges of 18cm and 8cm.

Find the surface area of the trapezoidal prism.
Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: The dimensions of a trapezoidal prism are given in the following diagram (not drawn to scale). A trapezoidal prism consists of two trapezium faces and four rectangular faces. The trapezium face has edges of 10cm, 5cm and 18cm and height of 3cm. The bottom face has edges of 18cm and 8cm.

Find the surface area of the trapezoidal prism.