Joe is a graduate student who works as a resident adviser (RA) in the college dormitory. As compensation for serving as an RA, he is not charged the $2,200 other students pay for their dormitory rooms for the fall 2013 semester. As an RA, he is required to live in the dormitory. He is also paid $1,500 for being available to dormitory residents at all hours during the fall semester. Joe also has a scholarship that pays him $12,000 to be used for his tuition for the academic year. He uses the scholarship proceeds to pay $6,000 of tuition in August 2013. In January 2014, he pays $6,000 for his spring semester tuition. What is Joe's gross income for 2013?