Sonia invested $80,000 this year to purchase a 30% interest in the BLA Partnership. The partnership reported $200,000 of net income from operations, a $2,000 short-term capital loss, and a $10,000 charitable contribution. In addition, the partnership distributed $20,000 to Sonia and $10,000 each to partners Louise and Amanda. If the partnership has no beginning or ending liabilities, what is Sonia's basis in her partnership interest at the end of the year?