>If in a report, I created a group, for example, group by month of a date field.
>Then I sum a price field, can I put the different sum of different month into a variable so I can use them in a formula at the bottom of the report?
>For example,
>Jan
>Mr. A $10000
>Mr. B $20000
> Sum1= 30000
>Feb
>Mr. A $2000
>Mr. B $3000
> Sum2= 5000
>----------------------------
> X = Sum1*0.4 + Sum2*0.6 <----- Do some operation by using the sum.
>How can I obtain sum1 and sum2?


Create 12 different report variables. Mark each of them as SUM and use the following expressions:

*Sum1
IIF(MONTH(yourdatefield)=1, yourdollarfield, 0)

*Sum2
IIF(MONTH(yourdatefield)=2, yourdollarfield, 0)

etc.

That should get you what you want.

Cathy