Baylor Lumber Products is considering the purchase of a high-efficiency conveyor system. Two manufacturers have approached Baylor with proposals: (1) Duke Industries and (2) Wake Manufacturing. Regardless of which vendor Baylor chooses, the following incremental cash flows are expected to be realized.

Year	Incremental Cash Inflows				Incremental Cash Outflows
1	$	29,000			$	23,000
2		30,000				24,000
3		35,000				29,000
4		38,000				32,000
5		37,000				31,000
6		36,000				30,000

a. If the machine manufactured by Duke Industries costs $30,000, what is its expected payback period?

b. If the machine manufactured by Wake Manufacturing has a payback period of 48 months, what is its cost?

c. Which of the machines is most attractive based on its respective payback period?