Shipping Limited up to specific quntity of same product

I am looking an extension dealing with Shipping Cost in terms of cost to be limited having same product adding up to spefic quantity (not weight based).


Example:
Product/abc £ 2.49 + Delivery £ 4.99 Up to "20" Packs Delivery Charges same £ 4.99 if some one add the same product in quantity 21 ..so delivery charges will be addes additional £4.99 ..meaning that limitations of 20 in quntity of same product. once each additional 20 figure is crossed it should add additional £4.99


Product/xyz £ 1.29 +Delivery £ 1.99 Up to “2” Packs Delivery charges £1.99 if some one add the same product in quantity 3..so delivery charges will be added additional £1.99 ..meaning that limitations of 2 in quntity of same product. once each additional 2 figure is crossed it should add additional £1.99

If your products fit into discrete categories, you might be able to use Category-Based Shipping (using a quantity-based rate) to create a system like that. In your example, you'd set the base cost to 2.49 and the rate field to something like:

20:4.99, 40:9.98, 60:14.97, etc.

Fantastic Johnathan. Thanks a lot Johnathan..I followed your instructions and its the thingy ....I was looking for.
Cheers mate.