What is the minimum cost of crashing the following project that Roger Solano manages at Slippery Rock University by $4$ days?

$\backslash$table$[[,\backslash$table$[[$Normal$],[$Activity$]],\backslash$table$[[$Crash$],[$Times$]],\backslash$table$[[$Normal$],[$Cost$]],\backslash$table$[[$Total Cost$],[$with Crashing Immediate Predecessor$($s$)]],],[$A$,6,5,$$$900,$$$1,000,-],[$B$,8,6,$$$300,$$$400,-],[$C$,4,3,$$$500,$$$600,-],[$D$,5,3,$$$900,$$$1,200,$A$],[$E$,8,5,$$$1,000,$$$1,600,$C$]]$

By how many days should each activity be crashed to reduce the project completion time by $4$ days? Fill in the table below.

$($Enter your responses as whole numbers.$)$

$\backslash$table$[[,\backslash$table$[[$Each Activity Should be$],[$Reduced BY$],[($days$)]]],[$Activity$,],[$A$,],[$C$,],[$D$,],[$E$,]]$

The total cost of crashing the project by $4$ days is $$.($Enter your response as a whole number.$)$