Thread: numerical listing?

I'm not sure if I titled this thread correctly.

Anyways, so I have data in Col.A that sometimes repeats itself.
I need to count how many times it repeats in Col.A with a numerical value in Col.B.

I've attached the following image for visual reference.
In the image below on the right, I've manually filled in the numbers, but there has to be a formula that will let me do this as I have thousands of lines to do this to.

http://farm7.static.flickr.com/6089/...4233260018.jpg