Melissa recently paid $800 for round-trip airfare to San Francisco to attend a business conference for three days. Melissa also paid the following expenses:$510 fee to register for the conference, $400 per night for three night's lodging, $220 for meals, and $445 for cab fare.

1) What amount of the travel costs can Melissa deduct as business expenses?

2) Suppose that while Melissa was on the coast, she also spent two days sightseeing the national parks in the area. To do the sightseeing, she paid $1,670 for transportation, $800 for lodging, and $285 for meals during this part of her trip, which she considers personal in nature. What amount of the travel costs can Melissa deduct as business expenses?

3) Suppose that Melissa's permanent residence and business was located in San Francisco. She attended the conference in San Francisco and paid $510 for the registration fee. She drove 176 miles over the course of three days and paid $184 for parking at the conference hotel. In addition, she spent $635 for breakfast and dinner over the three days of the conference. She bought breakfast on the way to the conference hotel and she bought dinner on her way home each night from the conference. What amount of the travel costs can Melissa deduct as business expenses?