Black and Shannon have decided to form a partnership. They have agreed that Black is to invest $360,000 and that Shannon is to invest $120,000. Black is to devote one-half time to the business, and Shannon is to devote full time. The following plans for the division of income are being considered: Equal division In the ratio of original investments In the ratio of time devoted to the business Interest of 6% on original investments and the remainder equally Interest of 6% on original investments, salary allowances of $96,000 to Black and $168,000 to Shannon, and the remainder equally Plan (e), except that Shannon is also to be allowed a bonus equal to 20% of the amount by which net income exceeds the total salary allowances