Activity Normal Preceding Crash Maximum

Time Activity Cost Crash Time

A $5$ None $301$

B $3$ None $602$

C $4$ A $00$

D $2$ A $101$

E $5$ B $603$

F $2$ C $1001$

G $5$ D $301$

H $2$ E $00$

I $3$ F$,$ G$,$ H $2001$

Use the information provided to crash one$-$time unit per move using the least cost method. Reduce the schedule until you reach the crash point of the network. The project duration is $15$ time units and the total direct cost is $$730.$ Indirect costs for each project duration are $$90(15$ time units$),$ $$70(14$ time units$),$ $$50(13$ time units$),$ $$40(12$ time units$),$ and $$30(11$ time units$),$ compute the total project cost for each duration. What is the optimal cost and time?

Group of answer choices

$$730$ at $15$ time units

$$960$ at $12$ time units

$$810$ at $14$ time units

$$1000$ at $12$ time units