What Is the Minimum Completion Cost of This Project If

Essay

What is the minimum completion cost of this project if there is a penalty of $1,000 for each day the project lasts longer than 27 days? Activity durations in days and crash costs in dollars are given in the table.
$\begin{array}{|l|l|l|l|l|l|l|l|l|l|}\hline&\text { Reg } & \text { Crash }& \text { Reg } &\text { Crash }&&\text { Reg } & \text { Crash }& \text { Reg } &\text { Crash } \\ \text { Activity }&\text {Length }&\text {Length }&\text {Cost }& \text { Cost }&\text { Activity }&\text { Length }&\text { Length }&\text {Cost }&\text {Cost }\\\hline \mathrm{A} & 7 & 6 & 400 & 1,200 & \mathrm{L} & 7 & 5 & 800 & 1,500 \\\hline \mathrm{C} & 1 & 1 & 450 & 450 & \mathrm{N} & 6 & 5 & 500 & 1,250 \\\hline \mathrm{D} & 9 & 6 & 550 & 2,350 &\mathrm{R} & 4 & 4 & 600 & 600 \\\hline \mathrm{E} & 9 & 7 & 500 & 1,650 & \mathrm{S} & 10 & 8 & 450 & 1,350 \\\hline \mathrm{J} & 2 & 1 & 600 & 1,800 & \mathrm{Y} & 8 & 6 & 675 & 1,750\\\hline \end{array}$