Question: The following code creates a new Dataframe column named Regional _ Total _ Sales where the sum of Sales for each region is calculated and

The following code creates a new Dataframe column named Regional_Total_Sales where the sum of Sales for each region is calculated and inserted for each row where the region matches.
babydf['Regional_Total_Sales']= babydf.groupby('Region')['Sales'].cumsum()
True or False? and why

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