Adding New Condition

Dear Experts,

We want to add new condition to our existing Pricing procedure.

Its for calculating the Freight and for Carrying forwarding .

I would like to know , while adding such condition to the pricing what should be the steps ( from the perspective of access sequence and other settings) i should follow.

Also is there any special care to be taken while adding new condition to existing Pricing Procedure?

Also while adding the Freight condition waht are the accounting settings that i need to be maintained .

Which conditin i should i select for the above scenario??

Regards,

sap mm