Given the following shapes: a rectangle with width 1 and height 4, a right_triangle with base 5 and height 3, a right_triangle with base 7 and height 5, a trapezoid with bases 1 and 1 and height 2. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Rectangle with width 1 and height 4: Area = 1 x 4 = 4
Right triangle with base 5 and height 3: Area = 0.5 x 5 x 3 = 7.5
Right triangle with base 7 and height 5: Area = 0.5 x 7 x 5 = 17.5
Trapezoid with bases 1, 1 and height 2: Area = 0.5 x (1 + 1) x 2 = 2.0</think>

<answer>31</answer>