Check your worksheet by changing the fixed expenses to $270,000. If your worksheet is oper- ating properly, the degree of operating leverage should be 10. If you do not get this answer, find the errors in your worksheet and correct them. How much is the margin of safety percent- age? Did it change? Why or why not? Enter the following data from a different company into your worksheet:

1. how much money did selfridge spend on advertising before the store’s opening? 2. explain what shopping was like in london during the early 1900s. how does this differ from the modern shopping experience? 3. what was the role of a floorwalker in 1900s london? 4. what inspired selfridge to ensure that customers in his store could browse at their leisure? do you need the links to the video?