Whip-It Manufactures Blenders

Whip-It manufactures blenders. In 2009 it had $50,000 of blenders in inventory. In 2010 it sold $300,000 of blenders to consumers and had $40,000 of blenders in inventory. How much did blenders produced by Whip-it add to GDP in 2010?

A) $340,000
B) $310,000
C) $300,000
D) $290,000