You have been hired by an international development agency to assess the economic payoffs to preventing the evolution of glyphosate-resistant weeds in maize production in South Africa. Your task iis to illustrate to South African maize farmers the longer-term value of managing to avoid the development of glyphosate resistant weeds, using maize as an example. Simply, it seeks to answer the basic question of a South African farmer, "why should I pay extra for weed control now for a problem that may only arise in the future?" Below is a table showing costs and returns for two farms. The Reactive Farm does not try to manage resistance, relying solely on glyphosate to control weeds. The Proactive Farm takes additional measures to delay resistance. Annual weed control costs are higher for the Proactive Farm. The Proactive Farm has higher costs, but its weed management prevents resistance over a 10-year time horizon. The Reactive Farm has lower costs initially, but scientists predict resistance will occur within 5 y