Using the network diagram and the additional information, find

1) The crash cost per day:

2) Which activities should be crashed to meet a project deadline of 13 days at minimum cost. Assume partial crashing is allowed.

3) Reconsider Questions above, assuming a fixed overhead cost of $30 per day but no project deadline. What is the leastcost crash program? What if the overhead cost was $40? What if it was $60?

\begin{tabular}{|l|c|c|c|c|} \hline Activity & Crash Time (days) & Crashed Cost (total) & Normal Time (days) & Normal Cost \\ \hline A & 3 & $500 & 4 & $300 \\ \hline B & 1 & 325 & 3 & 250 \\ \hline C & 4 & 550 & 7 & 400 \\ \hline D & 3 & 250 & 5 & 150 \\ \hline \end{tabular}