A Numerical Example Table 4.2 provides data on the marginal benefits of three consumers who desire security protection in a community. These data summarize the numbers used to derive the demand curve for security protection in Figure 4.5. In the table, the marginal benefits of as many as four security guards per week are shown for each consumer. TABLE 4.2 Hypothetical Marginal Benefits of Security Protection for a Community of Three People NUMBER OF SECURITY GUARDS PER WEEK 1 2 3 4 MBA $300 $250 $200 $150 MBB 250 200 150 100 MBC 200 150 100 50 ; $750 $600 $450 $300