For this lesson, cost means the money your company expects to spend to perform the line item: supplier goods, freight you must pay, packaging the files require, labor, and other outlays you can name. Price means the amount you offer the Government. FAR 15.401, for contract-pricing work in FAR subpart 15.4, defines price as cost plus any fee or profit applicable to the contract type. That definition describes how the Government talks about an offered price. It is not a promise that your commercial markup will be accepted, and it is not a recommended percentage.
A firm-fixed-price contract, under FAR 16.202-1, provides a price that is not subject to any adjustment on the basis of the contractor’s cost experience. That contract type places on the contractor maximum risk and full responsibility for all costs and resulting profit or loss. If you omit freight and later discover the delivery term is f.o.b. destination, the extra trucking is usually yours. Do not invent a higher number after award to cover a cost you skipped.
How you estimate cost inside your company is commercial practice. What you must put on the quote—unit prices, option prices, and any breakdown the instructions demand—is a contractual requirement copied from the solicitation. FAR 15.402 tells contracting officers to purchase at fair and reasonable prices and to price each contract separately, without using proposed price reductions under other contracts as an evaluation factor or considering losses or profits realized under other contracts. Those are Government pricing-policy rules. They are not permission to hide an incomplete cost estimate.