8. The rule of rational choice

The following graph input tool shows the marginal benefit (MB)(MB)and marginal cost (MC)(MC)curves for soccer balls in an economy. At 15 million soccer balls, expected marginal benefits are equal to expected marginal costs, E(MB)=E(MC)E(MB)=E(MC).

Use the graph input tool to answer the questions that follow. You will not be scored on any adjustments made to the graph input tool.

03691215182124273020181614121086420PRICE (Dollars per soccer ball)QUANTITY (Millions of soccer balls per year)MBMC

Graph Input Tool

	Quantity (Millions of soccer balls)
	Expected MB (Dollars per soccer ball)			Expected MC (Dollars per soccer ball)