The Damon Corp. has the following investment opportunities:

Machine A ($15,000)	Machine B ($22,500)	Machine C ($37,500)
Inflows	Inflows	Inflows
year 1 $6,000	year 1 $12,000	year 1 $-0-
year 2 9,000	year 2 12,000	year 2 30,000
year 3 3,000	year 3 10,500	year 3 30,000
year 4 -0-	year 4 10,500	year 4 15,000
year 5 -0-	year 5 -0-	year 5 15,000

Under the payback method and assuming these machines are mutually exclusive, which machine(s) would Damon Corp. choose and how many years does it take to recoup the original investment?