How do you calculate return for this question "Using the data in the table below, calculate the return for investing in Boeing stock from January 2, 2003, to January 2, 2004, and also from January 2, 2008, to January 2, 2009, assuming all dividends are reinvested in the stock immediately." This is similar to question 10.6 on the document that I'm currently looking at how do you solve to get a total return of -45.6% in the year of 2008?