You have acquired a revolutionary piece of software from inner Australia, which you are going to install as soon as possible for a client. You have contracted to have the system installed and users trained in 17 days, paying a penalty of $300 per day beyond 17 days. The critical path data for the project is:

Activity	Duration	Predecessor
A get import license	10 days	None
B shipping	8 days *	A
C train users in method	16 days	None
D train on system	2 days	B,C

You have options (*) for shipping (activity B):

Slow boat	8 days	$100
Fast boat	7 days	$200
Bush airplane	5 days	$400
Normal airplane	3 days	$600
Chartered plane	1 day	$900

Conduct a crashing analysis to determine the economically optimal choice of delivery.