Melissa recently paid $610 for round-trip airfare to San Francisco to attend a business conference for three days. Melissa also paid the following expenses: $385 fee to register for the conference, $335 per night for three night's lodging, $300 for meals and $175 for cab fare.a. What amount of the travel costs can Melissa deduct as business expenses? (Round your answer to the nearest dollar amount.)b. Suppose that while Melissa was on the coast, she also spent two days sightseeing the national parks in the area. To do sightseeing, she paid $1,660 for transportation, $910 for lodging, and $375 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? (Round your answer to the nearest dollar amount.)c. Suppose that Melissa made a trip to San Francisco primarily to visit the national parks and only attended the business conference as an incidental benefit of being present on the coast at the time. What amount of the airfare can Melissa deduct as a business expense? (Round your answer to the nearest dollar amount.)d. Suppose that Melissa's permanent residence and business was located in San Francisco. She attended the conference in San Francisco and paid $385 for the registration fee. She drove 75 miles over the course of three days and paid $170 for parking at the conference hotel. In addition, she spent $475 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 expense? (Round your final answer to the nearest whole dollar amount.)