Compute the total direct cost for each project duration. If the indirect costs for each project duration are $450 (22 time units), $400 (21 time units), $350 (20 time units), $300 (19 time units), $250 (18 time units), and $200 (17 time units), compute the total project cost for each duration. Then answer the questions.

Activity	Predecessor	Crash Cost (Slope)	Maximum Crash Time	Normal Time	Normal Cost
A	None	30	1	5	40
B	A	60	2	6	50
C	A	50	1	4	80
D	A	0	0	12	50
E	B	70	2	7	100
F	C	120	4	8	100
G	D, E, F	90	1	3	40

After crashing, the optimum cost for this project is $ 840 850 860 830