1. **State the problem:** Calculate the income amount in the second tax bracket for a salary of $60,000. 2. **Understand the tax brackets:** - First bracket: $0 - $6,000 taxed at 3% - Second bracket: $6,001 - $15,000 taxed at 4% - Third bracket: $15,001+ taxed at 6% 3. **Calculate the income in the second bracket:** The second bracket covers income from $6,001 to $15,000. 4. **Find the income range in the second bracket:** $$\text{Income in second bracket} = 15,000 - 6,000 = 9,000$$ 5. **Calculate the tax for the second bracket:** $$9,000 \times 0.04 = 360$$ 6. **Answer:** The income in the second bracket is $9,000, and the tax owed on this portion is $360. Thus, the green blank should be filled with $9,000.