Problem 4-13 (LO. 2) Determine Amos's gross income in each of the following cases, . If an amount is zero, enter "0." Gross Income a. In the current year, Amos purchased an automobile for $25,000. As part of the transaction, Amos received a $1,500 rebate from the manufacturer b. Amos sold his business. In addition to the selling price of the stock, he received $50,000 for a covenant not to compete-an agreement that he will not compete directly with his former business for five years. c. Amos owned some land he held as an investment. As a result of a change in the zoning rules, the property increased in value by $20,000