I have two columns

One columns is a date. There can be numerous occurances on one date.
For ex, 9/10/07 can have several entries. For each date I have values
of money expended on that date

I want to sum the values for one date together. I need formula - Thank
You fo your help!!!

Example

Date Value

9/1/07 2
9/1/07 3
9/2/07 45
9/3/07 34
9/2/07 1

Value for 9/1/07 should be 2+3 = 6
Value for 9/2/07 should be 45+34+1= 80