Given the following shapes: a right_triangle with base 1 and height 5, a right_triangle with base 7 and height 2, a trapezoid with bases 8 and 7 and height 2. What is the total area of all shapes? Please round the result to the nearest integer.
<think>Right triangle with base 1 and height 5: Area = 0.5 x 1 x 5 = 2.5
Right triangle with base 7 and height 2: Area = 0.5 x 7 x 2 = 7.0
Trapezoid with bases 8, 7 and height 2: Area = 0.5 x (8 + 7) x 2 = 15.0</think>

<answer>24</answer>