You can use any amount type for contract pricing. When you create a type P list, the system reads the price for a period of coverage directly from the price list in Contract Maintenance. When you create a type D list, the system determines the price for coverage by applying the discount percent to the price of the item in the item master. When you create a type M list, the system determines the price for coverage by applying the markup percentage to the cost set for the item at the contract site.