This Year,Shirts Inc

This year,Shirts Inc.purchased $1,000 worth of silk from the Silky Silkworm Company,$100 worth of buttons from Barney's Buttons,and $200 worth of thread from Tracy's Thread Company.Shirts Inc.sold the shirts they produced for $2,000.As a result of these transactions,how much did Shirts Inc.contribute to GDP this year?

A) $700
B) $1,300
C) $2,000
D) $2,700
E) $3,300