These can be solved by hand, but most will be solved much more easily with a spreadsheet An unmarried taxpayer with no dependents expects an adjusted gross income of $48,000 in a given year. His non-business deductions are expected to be $3400.

(a) What will his federal income tax be?

(b) He is considering an additional activity expected to increase his adjusted gross income. If this increase should be $16,000 and there should be no change in non-business deductions or exemptions, what will be the increase in his federal income tax?