Working with datasets - exporting data

Consider the following code:

Which additional lines need to be added to transform the totals dictionary to a DataFrame, and write that DataFrame to a CSV file?

50 XP

rf = pd.DataFrame.from_dict(mm, orient="index"); rf.to_csv("LocalDrive\\Sales.csv")
press1
rf = pd.DataFrame.from_dict(tt, orient="index"); rf.to_csv("LocalDrive\\Sales.csv")
press2
rf = pd.DataFrame.from_dict(tt, orient="index"); rf.tocsv("LocalDrive\\Sales.csv")
press3