total revenue minus total cost equals total profit
Profit maximization To obtain the profit maximizing output quantity, we start by recognizing that profit is equal to total revenue (TR) minus total cost (TC). Given a table of costs and revenues at each quantity, we can either compute equations or plot the data directly on a graph. The profit-maximizing output is the one at which this difference reaches its maximum.
Cost-plus contract A cost-reimbursement contract is appropriate when it is desirable to shift some risk of successful contract performance from the contractor to the buyer. It is most commonly used when the item purchased cannot be explicitly defined, as in research and development, or in cases where there is not enough data to accurately estimate the final cost.