45. Internal and Sustainable Growth Rates Best Buy reported the following numbers (in millions) for the years ending January 28,2017 , and February 3, 2018. What are the internal and sustainable growth rates? What are the internal and sustainable growth rates using and and the end-of-period equity (assets)? What are the growth rates if you use the beginning of period equity in this equation? Why aren't the growth rates the same? What is your best estimate of the internal and sustainable growth rates