Hamaya, a Japanese transportation company, is planning to build a new distribution centre in Kowloon district. The project manager proposed the following work breakdown structure with precedence requirements, estimated normal and crash times, and normal and crash costs.

Activity	Immediate Predecessor	Normal Time (Weeks)	Crash Time (Weeks)	Normal Cost	Crash Cost
A	None	5	3	18,000	30,000
B	A	10	7	109,500	120,000
C	A	4	3	9,000	10,000
D	A	7	5	56,000	60,000
E	B	8	5	90,000	97,500
F	B	6	4	12,000	15,000
G	C, D	7	4	25,000	32,500
H	G	3	2	80,000	83,000
I	E, F, H	9	5	110,000	138,000

(1) From the data shown, when the project will be finished at normal cost? Assume a linear cost per week shortened, determine how to finish the project as soon as possible at the minimum cost. Show, step by step, how you arrived at your schedule. No need not to show the final project network.

(2) If Hamaya is renting a temporary warehouse for $8,100 per week now, when should this warehouse construction project be completed in order to be most economical? Why?