In column D, I have a data point every fifteen minutes for every day of the
month.
In column A, I have the date and time.
I would like to sum the data in Column D for each day of the month.

I would like to end up with two columns- one with the date (feb 1-28) and
the other with the total for each day. There are 96 data points every day-
how can I do a simple drag and fill next to the column of 1-28 that gives me
the total for each day?

If I put in the following formula, =Sum(D1:D95), that gives me the total for
Feb 1st. If I put in the next row down, =sum(D97:D191), that gives me the
total for Feb 2nd. Is there some way to add 96 to the previous range so I can
just drag down and fill the total column for each day?