You have just been hired as a new staff accountant at the prestigious public accounting firm of Books We Cook, LLC. At retirement you want to travel the world and anticipate that it will cost approximately $100,000 a year to financially support these activities. Your plan is to travel for 20 years following retirement. You expect to retire at age 70 and you are 20 today. How much do you need to save annually in order to travel the world at retirement? Assume a market rate of return of 7%. How does your answer change if you decide to buy the Audi A4 at age 50? Assume the A4 costs $80,000 in 30 years.