Olga has to travel to Philadelphia for 2 days on business. She enjoys history and is planning to visit the Liberty Bell and other historic sites in the city. If time permits, she would like to make a side trip to nearby Gettysburg. A friend of Olga’s tells her, “The best part of traveling on business is that once the business is over, you can sightsee all you want and the cost is tax-deductible.” Olga, who is self-employed, has scheduled her trip for the Labor Day weekend so that she can spend 3 days sightseeing. Write a letter to Olga in which you explain whether her friend’s advice is correct.