$3-$Consider the project as outline in the tables below:

b$)$ What is the total crashing cost?

$\backslash$table$[[$Activity$,$Predecessor,$\backslash$table$[[$Normal Time$],[($wks$)]],\backslash$table$[[$Crash Time$],[($wks$)]],\backslash$table$[[$Normal$],[$Cost$],[($$$/$wk$)]],$Cost to Crash $($$$/$wk$)],[$A$,,16,8,1000,2200],[$B$,,14,9,500,900],[$C$,$A$,8,6,250,350],[$D$,$A$,5,4,300,700],[E,$B$,4,2,800,1500],[$F$,$B$,6,4,400,800],[$G$,$C$,10,7,1500,2500],[H,D,E,15,10,2500,4000]]$