Buck and Vern each owned an apartment building. Buck agreed to trade his apartment building for Vern's building. He also agreed to pay Vern an additional $10,000 for his building. Buck's basis in his building is $40,000. Vern has a basis of $50,000 in his building. What will Buck's basis be in the new apartment building? $30,000 $40,000 $50,000 $60,000