The document contains sample problems and their solutions from Chapter 4 on Gross Income from the textbook "Income Taxation 6th Edition". It discusses various types of income including compensation, business, property, and royalty income. It provides examples of calculating taxable gross income for different scenarios like salaries, allowances, business operations, rental properties, and natural resources. The problems cover identifying taxable vs non-taxable income and correctly computing gross income amounts reportable for income tax.