how to calcullate this scenerio in sap sd pricing

Hi all sap gurus

Please help I am in a crunch condition. My client is in warehouse business so he charges as per the pallet(sqft wise) with the days of renting.suppose a customer comes and asks for 500 pallet position for 5 days then system has to calcullate like below

(500 palet position5 daysamount per pallet position) how can I trigger all this in my pricing procudure. please please help me out.

your suggestion is highly appericiable

thanking you in advance