What rank should we assign to each project? Why do payback and NPV not agree completely? Which criterion is best?

	Project Number		1	2	3	4	5	6	7	8
	Initial Investment		($2,000)	($2,000)	($2,000)	($2,000)	($2,000)	($2,000)	($2,000)	($2,000)
	Year 1		$330	$1,666		$160	280	$2,200	$1,200	($350)
	2		330	334		200	280		900	(60)
	3		330	165		350	280		300	60
	4		330			395	280		90	350
	5		330			432	280		70	700
	6		330			440	280			1,200
	7		330			442	280			2,250
	8		1,000			444	280
	9					446	280
	10					448	280
	11					450	280
	12					451	280
	13					451	280
	14					452	280
	15				10,000	(2,000)	280
	Sum of Cash Flow Benefits		$3,310	$2,165	$10,000	$3,561	$4,200	$2,200	$2,560	$4,150
	Excess of Cash Flow
	Over Initial Investment		$1,310	$165	$8,000	$1,561	$2,200	$200	$560	$2,150