The following graph input tool shows the marginal benefit $(MB)$ and marginal cost $(MC)$ curves for baseballs in an economy. At $25$ million baseballs, expected marginal benefits are equal to expected marginal costs, $E(MB)=E(MC).$

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.

Graph Input Tool

Quantity $($Millions of baseballs$)$

Expected MB

$($Dollars per baseball$)$

$15$

Expected MC

$($Dollars per baseball$)$

Complete the following table by determining the relationship between the expected MB and the expected MC at each of the two quantities and what this means for society. $($Hint: Be sure to use a negative sign if the net benefit is negative.$)$

Quantity