How are costs and benefits calculated in economics?

In economics, costs and benefits are calculated by evaluating the monetary value of resources used (costs) versus the monetary value of the outcomes or advantages gained (benefits) from a particular decision or action. Costs can include explicit expenses, opportunity costs, and externalities, while benefits may encompass direct revenues, utility, and any positive impacts on stakeholders. The net benefit, which is the difference between total benefits and total costs, helps determine the economic viability of a decision. This analysis often employs techniques like cost-benefit analysis to inform policy-making and resource allocation.