Marginal product is to hiring decisions as marginal cost is to:

Marginal product refers to the additional output gained from hiring one more worker, helping businesses decide how many employees to hire. Similarly, marginal cost is the extra cost incurred when producing one more unit of a good or service, guiding firms on how much to produce. Just as businesses look at the marginal product to determine if hiring more workers is beneficial, they analyze marginal cost to decide if producing an additional item will be profitable. For example, if a factory sees that hiring an extra worker increases production significantly without raising costs too much, it may choose to hire that worker. In both cases, understanding these concepts helps companies make smarter decisions about resources and production.