Given the following INcremental Cash Flow for 2 alternatives, determine (a) the rate of return on the incremental cash flow, and (b) which alternative should be selected if the company's MARR is 25% per year. Alternative X3 requires the larger initial investment.
Year Incremental Cash Flow of X3 - P3 ($)
0 -2800
1-9 1100
10 2000
Seems fairly straight forward, but I keep messing up on determining the rate of return.