When asked in an interview what she missed the most because of the time she spent training for the Olympics, a rower, who lived on her own, answered "a normal social life." She also revealed that she had given up a job that paid $35,000 per year to train fulltime. She received a grant of $8,000 per year from Sport Canada, but this failed to cover all her training expenses. Her food and rent were $5,000 per year and training expenses were $12,000 per year. Aside from the value of a normal social life, what is the annual opportunity cost, expressed in dollars, to this rower of "Going for Gold"?