You are a Contracting Officer for the Department of Defense. You need to acquire 10 specific helicopters with definitive capabilities not yet in production. Thus, the overall cost is somewhat in flux, and the winning contractor will need to control costs, as you only have a certain bucket of money to pull from, but believe you may have some wiggle room if needed. You are concerned any fee desired by the contractor will grow based on the future expansion of the budget. Discuss in detail 1) what type of contract you should offer and/or is most suitable and 2) why that chosen contract type is advantageous based on the facts for the government.