30. A sole proprietor takes a business trip to Reno. On the way to Reno he stops in Las Vegas to visit a friend. He spends three days in Las Vegas and six days in Reno. His travel expenses for the nine days are \$630. If he had not stopped in Las Vegas, the cost of the six-day trip to Reno would have been $420. How much may be deducted before considering any meals limitation? A. $420 B. $630 C. $580 D. None of the above