Marginal analysis and cost benefit analysis are important analytical tools used in managerial decision-making to evaluate alternative courses of action, particularly in retail management where resources are limited and decisions directly influence profitability, customer satisfaction, and operational efficiency. These tools help managers compare options systematically by examining incremental gains, associated costs, and overall economic outcomes before selecting the most suitable alternative. Marginal analysis focuses on examining the additional or incremental benefits and costs that arise from a specific decision. In retail management, decisions such as increasing inventory levels, extending store hours, launching promotional campaigns, or hiring additional staff involve evaluating whether the extra revenue generated will exceed the additional cost incurred. The principle underlying marginal analysis is that a decision should be accepted only when