Different Shipping Prices based on quantity

Hi
What i want is like this:
1 product=2$ shipping
2 products=2.30$ shipping (so the original 2$ and 30 cents extra for the second item)
2 products =2.60$ shipping (more heavy product so this time 60 cents extra)

So what i want is depending on the second(third/forth…) product it will add either 30 cents or 60 cents to the final shipping cost

http://wordpress.org/plugins/woocommerce/