Excel Add Subtotals To Only One Category – 2432

Geert asks: “in my experience the datasets are non-uniform in the sense that only a subpart of the data needs subtotals. (categories of data are sequentially listed and only 1 category has a further breakdown that needs subtotals – the other categories do/must not) Is it possible to do that using the buttons on the ribbon?
This episode shows how to add subtotals to each customer in the manufacturing region.