Enable Macros prompt box may appear. Select "Enable Macros"
From the Tools menu, Select Macro -> Security...
A Security popup window will appear. Select "Medium", then OK.
You must close Excel then reopen the file to have the new security level take effect. Now, the Enable Macros prompt box will appear when you open "DNA_Table.xls". Select "Enable Macros."
The initial table should look like this: