Question 64: Even if there is no longer a requirement for the supplies or services, an invitation for bid (IFB) cannot be cancelled before bid opening. (T or F) Question 65: In the Federal acquisition process, when a contract contains a cost incentive, with a 80/20 share ratio, that means the seller receives eighty percent (80%) of any underrun as additional profit or fee, and the buyer retains twenty percent (20%) of the cost of any underrun. (T or F) Question 66: In a cost plus fixed fee contract for experimental, developmental, or research work, the negotiated fee may not exceed 15 percent of the contract's estimated cost, excluding fee. (T or F)