Given the table below describing the total and marginal benefit Elvis
gets from fried peanut butter and banana sandwiches.
[tex]\begin{tabular}
{|p {3.5cm}|p {2.0cm}|p {2.6cm}|}
\multicolumn {3} {|c|} {Elvis' Fried Peanut Butter and Banana Sandwich Benefit}\\[2ex]
Fried PBB Sandwiches&Total Benefit (dollars)&Marginal Benefit (dollars)\\[1ex]
1&&42\\
2&&24\\
3&75&\\
4&81&\\
5&&-3
\end{tabular}[/tex]
The marginal benefit of the 4th fried peanut butter and banana sandwich is given by $81 - $75 = $6.