In return for a 20% partnership interest, Skinner contributed $5,000 cash and land with a $12,000 basis and a $20,000 fair market value to the partnership. The land was subject to a $10,000 mortgage that the partnership assumed. Additionally, the partnership had $20,000 in recourse liabilities that would be shared by partners according to their partnership interests. What amount represents Skinner's basis in the partnership interest?