Numbers: summing categories sub total
Hello
I have a simple table. I have created a category "month" using the column with dates, and subtotals in the categories with values.
The year has just began, so my table will grow, and the subtotals will be updated. Perfect.
I would like now to have a row with the grand total, that would be updated every time I add a new value, like the subtotals are updated. Is there a way to do that ?
Thanks