Partner D was given (by his mother) his 20% interest in a business in which capital is not a material income-producing factor, resulting in a partnership in which D and his mother are the only partners. The partnership agreement states that D will get a distributive share of 20% of the partnership income, but his mother has capital of $360,000 in the partnership, and D's capital (given to him by his mother) was $40,000. The income of the partnership before consideration of any guaranteed payment is $300,000. His mother performs services for the partnership worth $100,000, but only takes a guaranteed payment of $40,000 in return. D performs no services for the partnership, and any distribution in liquidation or withdrawal is based on capital account balances. How much should D's distributive share of partnership income be