\be
\item Most nutritional guidelines stipulate that sodium intake be limited daily to 2400 milligrams.
Sodium amounts for the four sandwiches are given in Table \ref{Ta:Exercises_Maple_Diet_Sodium}.
Show that if the limit on daily sodium intake is incorporated into the four-sandwich diet model, then
the LP becomes infeasible. Estimate the minimum daily sodium intake for which a feasible solution exists.

\begin{table}[h]
\centering
\caption{Sandwich sodium amounts}\label{Ta:Exercises_Maple_Diet_Sodium}
\begin{tabular}{|l|c|}
\hline
Sandwich  & Sodium Amount (mg.) \\
\hline
Turkey Breast & 1000 \\ \hline
Club & 1290 \\ \hline
Veggie Sub & 500 \\ \hline
Breakfast Sandwich & 1500 \\ \hline
\end{tabular}
\end{table}

\newpage
\item Suppose we desire to follow a modified four-sandwich diet that seeks to minimize carbohydrate intake subject to fulfilling nutritional guidelines for only protein, vitamin A, vitamin C, calcium, and iron while consuming at least 40 grams of fiber per day. What four-sandwich diet accomplishes this goal? What is the corresponding carbohydrate intake?		
\ee
