Assume the project data given in Table.

Determine the Cost slope for each activity

Calculate the normal direct costs of the project

$\backslash$table$[[$Activity$,$Predecessor,Normal,Crash,,Cost slope,$],[$Duration $($day$),$Cost $($JD$),$Duration $($day$),$Cost$($JD$),],[$A$,-,52,1200,77,1400,,,],[$B$,$A$,23,1800,15,2800,,,],[$C$,$A$,45,1700,25,1900,,,],[$D$,$B$,$ C$,35,1400,20,2000,,,]]$