Since this is a test, maybe I shouldn't answer at all; but, I will give you some hints.
Take out a sheet of graph paper. Using a ruler, carefully reproduce this on the graph paper, counting the blocks carefully so that you end with an accurage drawing.
Using your ruler, divide the picture into rectangles and triangles and find the area of each rectangle and triangle.
Find the sum of all the individual areas.
Using this sum, find the cost for each of the options.