Given the tasks, estimated durations, and crash costs shown below, what is the total cost of the steps needed to provide the cheapest way to reduce the project length by three days?

$\backslash$table$[[$Task$,\backslash$table$[[$Predecessor$],[$s$]],\backslash$table$[[$Estimated$],[$duration$],[($days$)]],\backslash$table$[[$Crash out$],[$per day$]],\backslash$table$[[$Number of$],[$days task$],[$can be$],[$crashed$]]],[$A$,$none,$2,$$$1000,2],[$B$,$A$,3,$$$400,1],[$C$,$A$,3,$$$300,2],[$D$,$B$,$ C$,4,$$$800,1],[$E$,$D$,3,\backslash$table$[[$Cannot be$],[$crashed$]],0]]$

A$.$ $$2,800$

B$.$ $$2,500$

C$.$ $$1,100$

D$.$ $$2,300$