Step 1: Download the spreadsheet and open it (a.k.a. dealing with macros)

Seems simple enough, but this step can actually be a little confusing. First, Right-click here and choose Save Target As... to download the spreadsheet. (Don't open the spreadsheet in your browser. Save it to your hard drive and then open it.)

You will need to open the spreadsheet in Excel and enable the macros. When you open the spreadsheet, you will see a warning like this:

You want to click the Enable Macros button. 

If you do not get this window, you probably got something like this instead:

In order to enable macros in this situation, CLOSE THE SPREADSHEET (File: Close).  Then, in Excel, go to Tools: Macro: Security and change the security setting to Medium, like this:

Now try to reopen the spreadsheet.

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