Two envelope contract is to be constructed where each contractor submits two envelope; technical and financial envelope. Select the best contractor considering the following information:

Criterion	Contractors
	A	B	C	D	E
6 Bid amount (10 SR)	8	6.5	6	7.2	7.5
6 Life cycle cost (10 SR)	2	1.5	2.2	1.3	1.4
Years in business	30	18	16	27	10
Project duration (months)	18	24	23	21	22
Reputation and staff	VG	G	G	E	VG

Note: E = Excellent @ 100%, VG = very Good @ 80%, G = Good @60% Given that:

1. Financial evaluation = 40% of them, 30% on Bid amount only
2. Technical evaluation is distributed evenly on all criteria