Using the information provided in the table, the network diagram and the project completion time $=25$ weeks, reduce the completion time of the project by $3$ weeks in the most economical way.

$\backslash$table$[[,\backslash$table$[[$Normal$],[$Time$],[$Activity$]],\backslash$table$[[$Normal$],[$Cost $($$$)]],\backslash$table$[[$Crash$],[$Time$],[($weeks$)]],\backslash$table$[[$Crash$],[$Cost $($$$)]],\backslash$table$[[$Maximum$],[$weeks$],[$Reduced$]],\backslash$table$[[$Crash$],[$Cost per$],[$Week $($$$)]]],[$A$,3,500,2,900,1,400],[$B$,4,600,3,700,1,100],[$C$,6,800,3,1,346,3,182\mathrm{.}00],[$E$,6,1,500,4,2,150,2,325],[$F$,5,1,750,4,2,250,2,250],[$G$,7,1,200,5,1,200,0,0],[$H$,3,500,3,500,2,167]]$

Reduce G by $$ week$($s$),$ Cby $$ week$($s$),$ at a cost of $ $$