This year, Agustins distributive share from Eden Lakes Partnership includes $5,000 of interest income, $5,000 of net long-term capital gains, $9,000 net 1231 gain from the sale of property used in the partnership's trade or business, and $83,000 of ordinary business income.

a. Assume that Agustin materially participates in the partnership. How much of his distributive share from Eden Lakes Partnership is potentially subject to the net investment income tax?