I want to assign a base price i.e $6 and for each additional quantity i want price to increase by $4. E.g. If i add 2 quanity of the product than price will be : $6 (Base) + $4 (Additional qty price) = $10 Total price How do i achieve in Magento.

I did some R&D and all they suggest is price tier. But i think it will also change first quantity(Base) price of the product.

Can anyone please suggest the best possible way to achieve this !