Cumulative totals
 

Can anyone help
I have a list of numbers with an associated date in two coulmns which are
NOT in date order. I wish to add up the numbers in date order creating a
cumulative total to be recorderd in a third cell on the line of the latest
number added.

looking something like

3/5/2003 4 9
2/2/2002 5 5
7/5/2007 1 21
8/9/2004 9 20
6/7/2003 2 11

I have used VBA and can write functions if this is the best approach
Thanks in advance

Ian