Anyone and is there a easy why to do this if so let me know

The area of rectangle is base x height

9(8) = 72 (area of rectangle)

The area of triangle is 1/2(b)(h)

1/2(9)4 = 9(2) = 18 (area of triangle)

72 + 18 = 90m²

It costs $0.35 per square meter

90(0.35) = $31.5

$31.50 is your answer

hope this helps