We don’t have the answer for you, but the first step is understanding how much electricity you use and how it fluctuates day-to-day, over the week, seasonally and day and night. Here we show you how to take typical data that you’d get from your local electric company, put it in a form that Excel can handle and use PivotTables and PivotCharts to visualize usage fluctuations. This is the type of real-world case study you’ll get in the class Getting Answers from Data using Excel for Mac or Windows.