=11-31 The managing partner of the Scott Corey accounting firm (see Problem 11-30) has decided that the system must be up and running in 16 weeks. Consequently, information about crashing the project was put together and is shown in the following table:

Activity Immediate Predecessors Normal Time

(Weeks)

Crash Time

(Weeks)

Normal Cost ($)

Crash Cost ($)

A — 3 2 8,000 9,800 B — 4 3 9,000 10,000 C A 6 4 12,000 15,000 D B 2 1 15,000 15,500 E A 5 3 5,000 8,700 F C 2 1 7,500 9,000 G D, E 4 2 8,000 9,400 H F, G 5 3 5,000 6,600

(a) If the project is to be finished in 16 weeks, which activity or activities should be crashed to do this at the least additional cost? What is the total cost of this?