I have one column of dates and a second column of costs. How would I sum all
of the particular costs for a certain month.

Put Jan in D1, say, and this formula in E1:

=SUMPRODUCT(--(TEXT(A1:A1000,"mmm")=D1),B1:B1000)

Or, better still, put 'Jan-09 (with the apostrophe) in D1, and this
formula in E1:

=SUMPRODUCT(--(TEXT(A1:A1000,"mmm-yy")=D1),B1:B1000)

You need to put other months or month-year combinations in cells below
D1, then you can copy the formula in E1 down that column.

Hope this helps.

Pete

On Dec 11, 2:46*pm,
m wrote:
I have one column of dates and a second column of costs. How would I sum all
of the particular costs for a certain month.

Hi,

Try this

=SUMPRODUCT((MONTH(A1:A10)=12)*(YEAR(A1:A10)=2009) *(B1:B10))

Mike

" wrote:

I have one column of dates and a second column of costs. How would I sum all
of the particular costs for a certain month.

That's great. However, I would like to do the summing irrespective of the
year. I am trying to show a multi year trend with the data displayed only by
the month. In this case the total number of dollars spent a certain month
with five year spread. I don't care what the year is, only the cumulative
amount that was spent in each of the 12 months. I tried to remove the year
part of the statement but got an error message. I've never done array
calculations before, so consider me ignorant of how they operate.

Thanks

Samm

"Mike H" wrote:

Hi,

Try this

=SUMPRODUCT((MONTH(A1:A10)=12)*(YEAR(A1:A10)=2009) *(B1:B10))

Mike

" wrote:

I have one column of dates and a second column of costs. How would I sum all
of the particular costs for a certain month.

=SUMPRODUCT((MONTH(A1:A10)=12)*(YEAR(A1:A10)=2009 )*(B1:B10))
I tried to remove the year part of the
statement but got an error message.

Try this...

=SUMPRODUCT(--(MONTH(A1:A10)=12),B1:B10)

--
Biff
Microsoft Excel MVP


"
m wrote in message
...
That's great. However, I would like to do the summing irrespective of the
year. I am trying to show a multi year trend with the data displayed only
by
the month. In this case the total number of dollars spent a certain month
with five year spread. I don't care what the year is, only the cumulative
amount that was spent in each of the 12 months. I tried to remove the
year
part of the statement but got an error message. I've never done array
calculations before, so consider me ignorant of how they operate.

Thanks

Samm

"Mike H" wrote:

Hi,

Try this

=SUMPRODUCT((MONTH(A1:A10)=12)*(YEAR(A1:A10)=2009) *(B1:B10))

Mike

" wrote:

I have one column of dates and a second column of costs. How would I
sum all
of the particular costs for a certain month.