A government contractor had a contract with NASA to build a space shuttle. Under this contract, all costs of development and construction are to be reimbursed and the contractor is to be guaranteed a specific profit. At the same time, the contractor had a fixed-fee contract with the U.S. Air Force to build fighter planes, which limited total reimbursement to the contractor to a fixed amount. The Air Force contract had a cost overrun that the contractor transferred to the NASA contract. Explain how this might have been accomplished and why the contractor might have thought it was desirable.