What Is the Cost to Finish This Project (All Activity

What is the cost to finish this project (all activity durations are in weeks and costs in US dollars)as quickly as possible? $$\begin{array} { | l | l | l | l | l | l | } & & \text { Normal } & \text { Minimum } & \text { Normal } & \\ \text { Activity } & \text { Predecessor } & \text { Time } & \text { Time } & \text { Cost } & \text { Crash Cost } \\\hline \mathrm { A } & & 12 & 10 & 1000 & 1500 \\\hline \mathrm { B } & \mathrm { A } & 5 & 3 & 1200 & 1950 \\\hline \mathrm { C } & \mathrm { A } & 9 & 7 & 1500 & 2100 \\\hline \mathrm { D } & \mathrm { B } , \mathrm { C } & 14 & 10 & 1800 & 2100 \\\hline \mathbb { E } & \mathrm { B } & 4 & 3 & 1400 & 1875 \\\hline \mathbb { F } & \mathrm { D } & 9 & 8 & 1000 & 1450 \\\hline \mathrm { G } & \mathrm { E } & 7 & 5 & 700 & 1200 \\\hline \mathrm { H } & \mathrm { F } , \mathrm { G } & 11 & 8 & 2000 & 3000 \\\hline \mathrm { I } & \mathrm { H } & 8 & 6 & 1100 & 1700 \\\hline\end{array}$$