Find the area of the shaded region.

24

area of a parallelogram
 one half of the product of the diagonals
 the product of the base and height

So there are 2 big triangles
You could find the areas of all 2 triangles and add them all up, because those 2 triangles make up the shaded region
The formula for area of a triangle: a=1/2bh
The length of the triangles are 6, b/c 3+3 is 6
Both of their heights are 4
a=1/2bh
a=1/2*4*6
a=2*6
a=12 units squared
that is the area of one triangle
both triangles are equal, so multiply 12 by 2, and you get 24
24 units squared
hope this helps!

38 dollars is your answer.