&amp; \text{Trapezoids} \ A= \frac{1}{2}(35+19)15=405\\&amp; \text{Rectangles} \ A=17 \cdot 40=680\\&amp; \qquad \qquad \quad A=35 \cdot 40=1400\\&amp; \qquad \qquad \quad A=19 \cdot 40=760\\&amp; \qquad \quad \ \text{Total} = 405 + 405 + 680 + 680 + 1400 + 760\\&amp; \qquad \qquad \quad \ \ = 4330 \ units^2