sharepoint 2010: Perform Calculations among list items of different lists within same site collectjon

Hi All,

I have a situation,where I have  2 lists say list A and list B. 

List A take few inputs and List B takes few inputs. 

Now I need to create a new list where the different calculations are performed in different list items. These calculations are based on the inputs of List A and List B listItems.

Can anyone suggest me a solution to get it.

thanks in Advance.