The easiest way to solve this is creating two shapes; cut the top off so it's a square-like shape, and you'll also have the long rectangle at the bottom.
the first shape's area is 3.8 x 4 = 15.2
the second is 13.05 x 3.6 = 46.98
since originally it's one shape, add them together. the area is 62.18 ft^2.