What is the appropriate way to allocate costs for proposal preparation in this instance? The RFP for the contract I have identified certain performance specifications as tradeable. We bid this competitive proposal without bidding one of the specifications identified as such. We won and at kick-off, the customer indicated that the particular specification should not have been identified as tradeable. My company is in the process of preparing a proposal for this portion of the spec which is also included in the contract's statement of work. I am confused about how the costs to prepare this proposal should be allocated. I know that typically when you receive an RFP you are not allowed to charge the government for proposal preparation and it's charged to B&P. Would this be handled in this manner? Would we submit as an ECP? Are ECP preparation costs chargeable to the program? Is this considered an unsolicited proposal? Is this an REA? Are those costs chargeable to the program? Please advise.