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I think answer is B.I am not sure because I found purple it is 1.350 but I found the yellow is 240 and it is more close to 420.I telling you I am not sure but this is my opininon.

Easy!!

So, We want the area of the square, and the two trapezoids around it!

Square Formula = b*h

Trapezoid formula = 1/2(b^1+b&2)

First of all, to find the area of the square:

Do 20*12
= 240 in^2

Second of all, to find the area of the trapezoid:

Do 10(12+30)
= 420 in^2

To find the area of the whole banner, add them up!

= 420 + 420 + 240 = 1080 

So, The answer should add up to 1080.
The answer is probably "B"