Data on small maintenance project is given as in the table below. On completion, the project will give a return of$$$$150/$day$.$ Using time$-$cost trade$-$off method, how much would you like to compress the project for maximizing the return $($ignore the Indirect Cost effect$)?$ Show all calculations.

Activity

Depends on

Normal

Crash

Time $($days$)$

Cost $($$$)$

Time $($days$)$

Cost $($$$)$

A

$-$

$8$

$700$

$6$

$900$

B

A

$4$

$400$

$3$

$500$

C

A

$5$

$600$

$2$

$900$

D

A

$3$

$625$

$2$

$775$

E

B$,$ C

$6$

$400$

$6$

$400$

F

B$,$ C$,$ D

$8$

$500$

$6$

$700$

G

C$,$ D

$11$

$1150$

$8$

$1300$

H

D

$7$

$800$

$5$

$950$

I

E$,$ G

$5$

$350$

$4$

$600$

J

F$,$ G

$8$

$750$

$6$

$950$

K

G$,$ H

$4$

$420$

$3$

$580$

L

H

$9$

$925$

$7$

$1075$

M

I, K$,$

$6$

$350$

$4$

$670$

N

J$,$ K$,$ L

$5$

$860$

$2$

$1100$

O

L$,$ M$,$ N

$7$

$540$

$4$

$720$