Myers, Inc. entered into a contract with Stairway Inc. Stairway was to manufacture a hydro powered generator. The generator was to be delivered by September 15. The contract contained the following provision: "Damages. Stairway, Inc. will pay Myers. Inc. $500 per day in damages for each day after September 15 that delivery of the generator is delayed." The damages provision is called: An incidental damage clause. A compensatory damage clause. An accord and satisfaction provision. A liquidated damages clause