1. Jim paid his brother to provide computer services for Jim's business. Jim paid him $14,000. Other firms provide the same services for $5,000. How much of this expenditure is deductible?

2. XYZ landscaping sold a truck during 2021 for $15,000 recognizing a gain of $2,000. What is the adjusted basis of the truck?

3. Bill earned $50,000 from self employment during 2021. How much must he pay in self employment tax?

4. Ed commutes to work every day during 2021. He spent $3,000 in transportation. How much can he deduct for 2021?