[users] Group sums

[John Meyer]

i have a spreadsheet set up with the miles that I've biked on a 
particular day.  What I want is to the side to get a grouping of those 
entries by day and the sum.  I can do it with  subtotals but that 
inlines them with the data where i want the totals to the side.

The data looks like this, btw:

        Date    Miles
To work         07/18/08        3.2
To home         07/18/08        3.2
To work         07/19/08        3.2
To home         07/19/08        3.2