Suggestion :-
In the system user can follow the following steps to apply rate calculation method to create pricelist
1) Define the rate calculation Method in Following tab
SCM > SCM Setting > Pricing/credit policy > Rate Calculation Method
2) Then define new pricelist that user wants user can generate from Pricelist Master defination
Step 3) The Edit the Parent pricelist on which basis the new pricelist should get generate and map the rate calculation method and target pricelist which the user need to create ( the one user have define in step 2)