Which type of contract may be used when the method of contracting is sealed bidding?

The appropriate choice in this situation is a fixed-price contract with economic price adjustment. Sealed bidding is typically used when a government agency wants to procure goods or services with a clear definition of requirements and where price is a significant factor in the award decision.

Fixed-price contracts are suitable for this context because they establish firm prices for the duration of the contract, providing both parties with clarity and predictability regarding the financial commitment. The addition of an economic price adjustment allows for flexibility in instances where economic conditions might affect the cost of performance, such as fluctuations in labor rates or material costs. This feature makes the contract adaptable while still adhering to a fixed-price structure, which aligns well with the sealed bidding approach that emphasizes transparency and fairness in the procurement process.

Other contract types listed, such as cost-plus fixed fee, time and materials, and cost-reimbursement contracts, involve varying levels of cost uncertainty and are typically utilized in different contracting methods, such as negotiated procurements, where requirements are less defined or where the contractor's performance cannot be readily estimated. Therefore, they do not align well with the sealed bidding approach, validating why fixed-price with economic price adjustment is the correct and most appropriate choice.