Question 1 ( 2.75 points) From A B C Demand Among all of empty cells, cell A1 has the most negative improvement index. What is the maximum quantity that can be shipped to cell A1 on the money-saving route? \begin{tabular}{|c|} \hline 80 \\ 120 \\ 60 \\ 30 \\ 100 \\ 70 \\ \hline \end{tabular}