Given the following shapes: a right_triangle with base 3 and height 1, a trapezoid with bases 4 and 2 and height 5, a trapezoid with bases 7 and 4 and height 1, a trapezoid with bases 7 and 1 and height 4. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Right triangle with base 3 and height 1: Area = 0.5 x 3 x 1 = 1.5
Trapezoid with bases 4, 2 and height 5: Area = 0.5 x (4 + 2) x 5 = 15.0
Trapezoid with bases 7, 4 and height 1: Area = 0.5 x (7 + 4) x 1 = 5.5
Trapezoid with bases 7, 1 and height 4: Area = 0.5 x (7 + 1) x 4 = 16.0</think>

<answer>38</answer>