Options pricing options & copy cart

I am currently a Monster Commerce user looking to switch to 3D. So far I am very impressed.

Is there a way to give the options a pricing level discount. For example, a T-Shirt would have a base price of 10.00 with an adder of 2.50 for 2XL. This shirt would have a base price of 5.50 at price level 2. How do I change the 2XL option price to $.75?

2nd Question
Is it possible to use the database (products) from 3D cart "www.A.com" and use the same database (products) on 3D cart "www.B.com" of course carts are owned by the same person.