I'm wanting to make a small program that when people paste in some long text like below:

05/01/2009 02:14:59 Ad Package Bonus in amount of 4.
05/01/2009 02:14:59 Ad Package acquired in amount of 16.
04/30/2009 11:05:37 Ad Package Bonus in amount of 2.
04/30/2009 11:05:37 Ad Package acquired in amount of 11.


That I can have a button that will ad up the numbers on the right side

So the solution would be: 33

Any Ideas??