Use the Information in the Table (All Times Are in Days)to

Multiple Choice

Use the information in the table (all times are in days) to determine the lowest total cost for a 20-day project if the base cost for each activity finished in normal time is $1,000. $\begin{array}{|l|l|l|l|l|} \hline&\text { Normal }&\text {Minimum}&\text { Crash Cost }\\ \text {Activity}&\text {Time}&\text {Time}&\text { (\$/day) }& \text { Predecessor }\\\hline\mathrm{A} & 10 & 6 & \$ 70 & -- \\ \hline \mathrm{B} & 6 & 3 & \$ 40 & -- \\\hline \mathrm{C} & 2 & 2 & - & \mathrm{ B } \\\hline \mathrm{D} & 4 & 2 & \$ 60 & \mathrm{C } \\\hline\mathrm{E} & 6 & 4 & \$ 80 & \mathrm{ A } \\\hline \mathrm{F} & 8 & 5 & \$ 90 & \mathrm{D}, \mathrm{ E }\\\hline \end{array}$

A) $6,280
B) $6,390
C) $6,530
D) $6,740