Find an initial solution to the following transportation problem for Supply Chain Manager Gabriela Valdez. The starting solution using northwest-comer method is: a) The fotal cost of the initial solution developed using the northwest-comer method =$ The starting solution using the intuitive lowest-cost method is: b) The total cost of the initial solution developed using the intuitive lowest-cost method =$ c) The total cost of the optimal solution =$. (Note: You must enter a shipment in every cell, even if the shipment is 0. ) \begin{tabular}{|c|c|c|c|c|c|c|c|} \hline \multirow{3}{*}{\begin{tabular}{l} From \\ Mexico City \end{tabular}} & \multicolumn{6}{|c|}{ To } & \multirow{3}{*}{\begin{tabular}{c} Supply \\ 140 \end{tabular}} \\ \hline & \multicolumn{2}{|c|}{ Los Angeles } & \multicolumn{2}{|c|}{ Calgary } & \multicolumn{2}{|c|}{ Panama City } & \\ \hline & & $6 & & $18 & & $8 & \\ \hline Detroit & & $17 & & $13 & & $19 & 80 \\ \hline Ottawa & & $20 & & $10 & a & $24 & 60 \\ \hline Demand & 100 & & 70 & & 110 & & \\ \hline \end{tabular}