R&S Associates is a partnership with a tax year that ends on August 31, 2016. During the partnership's tax year, Robert, a partner, received $1,000 per month as a guaranteed payment, and his share of partnership income after guaranteed payments was $21,000. For September through December of 2016, Robert's guaranteed payment was increased to $1,500 per month Calculate the amount of income from the partnership that Robert should report for his 2016 calendar tax year