Bobby Brady has a full-time job as an electrical engineer for the oty ulty. In spare time, Bobby repairs electronic gear in the basement of his personal residence. Most of his business comes from friends and referrals from former customers, though soally he runs and in the local suburtia newspaper. Typically, the tems are dropped off at Bobby's house and later picked up by the owner when notified that the repairs have been made. The floor space of Bobby's residence is 2,500 square feet, and he estimates thet 20% of this is devoted exclusively to the repair business (ie, 500 square feet). Gross income from the business is $13,000, while business expenses (other than home office) are $5,000. Expenses relating to the residence are as follows: Real property taxes Interest on home mortgage Operating expenses of residence Depreciation (based on 20% business) $4,500 8,000 3.000 1,000 What is Bobby's net income (gross income-business expenses) from the repair business a. the uses the regular (actual expense) method of computing the deduction for office in the home? b. the uses the simplified method