Cheaper shipping for more than one item

Hello I am currently running the latest version of zen cart, 1.3.9h

I am trying to set up my shipping so that it costs the base price lets say 8 dollars for an item.... how ever if they order another item it will only cost one dollar more. So here is the hypothetical situation.

The person on the site orders three things:
Dog Collar x2
Dog Bone

Well shipping on all my items will be the same, $8

however I only want to charge the customer $8 plus $1 for each additional item.

So I only want to charge the client $10 total for shipping. Since the first item was $8 and each additional was $1.

I think I explained this well enough. If not just ask I really have been scratching my head on this one.

-Adam

If you are basing this on total items, then use the Item Rate item and set the Handling to 7.00 and the Rate to 1.00 ...

This will give you $8.00 for the first Item and then add a $1.00 for each additional item ...