You have just been informed that a purchase order you recently awarded for commercial services is no longer needed and must be cancelled. The order was accepted in writing by the contractor. Which one of the following statements is true? The purchase order is considered cancelled once the contractor submits a claim for costs incurred as a result of the Government's written cancellation. The purchase order is considered cancelled if the contractor accepts the Government's written cancellation and does not claim costs were incurred. A purchase order cannot be cancelled after award unless the contractor is in default. The purchase order must be terminated in accordance with FAR 12.403 and FAR 52.212-4.