Agatha is a tomato farmer. She procuces 500 boxes of tomatoes. Each box of tomatoes is sold for$40.She pays wages of$8,000to her workers. She buys$5,000worth offertilizer,which is needed to produce the tomatoes. She pays$2,000in taxes.Agatha'scontribution to GDP is

A.

$8,000

B.

$5,000

C.

$20,000

D.

$15,000

E.

$7,000