Catherine contributes land to the newly formed CD Partnership in exchange for a $30\%$ interest. The land has an adjusted basis and fair market value of $$300,000$ and is subject to a liability of $$100,000,$ which the partnership assumes. None of this liability is repaid at year$-$end. At the end of the year, the partnership owes payables of $$20,000.$ Assume that all liabilities are allocated proportionately to the partners. Total partnership income for the year is $$400,000.$

What is Catherine$$s basis in her partnership interest at the end of the year?