Please explain how to solve this problem

P, L, and O are partners with capital balances of $50,000, $30,000 and $20,000 and who share in the profit and loss of the PLO partnership 30%, 20%, and 50%, respectively, when they agree to admit C for a 20% interest. If C contributes $40,000 to the partnership and the goodwill method is used, will be debited for goodwill? $15,000 $20,000 $25,000 $28,000 $60,000