Consider an economy which produces and sells, among a host of other things, 100 million T‑shirts a year. The average T‑shirt begins life when a farmer plants seeds she put away last year, waters them, and harvests the cotton, then sells the cotton to a mill for $0.75, which sells the fabric to a T‑shirt factory for $1.50, which sells its T‑shirts to a wholesaler for $5, who sells it to Nordstrom for $10, which finally sells it to you for $17. Determine the impact of T‑shirts on annual GDP by calculating the value added of the entire production process.