on 3 3. Firm BookInc hire workers to produce and sell books, using papers bought from firm PaperInc (for simplicity, we ignore other materials and equipment for producing books.). We have the following information about BookInc during a year: Papers purchased from PaperInc Wages paid to BookInc workers Taxes paid to government Profits $4,000 $5,000 $1,000 $3,000 What's BookInc's value added during this year? A) $3,000 B) $6,000 C) $9,000 D) $13,000