David and Joycelyn form an equal partnership in the current year. No special allocation is provided for in the partnership agreement. During the year David contributes land having a $90,000 basis and a $100,000 FMV in exchange for the initial partnership interest. In addition, the partnership earns $50,000 of ordinary income while partnership liabilities increase from zero to $30,000 by the end of the tax year. The partnership earns $20,000 of tax-exempt interest during the year. David's basis at the end of the current year is