This problem is useful for testing the ability of financial calculators and computer software. Consider the following

Question:

This problem is useful for testing the ability of financial calculators and computer software. Consider the following cash flows. How many different IRRs are there?
Year Cash Flow
0 ......... -$ 1,008
1 ......... 5,724
2 ......... - 12,140
3 ......... 11,400
4 ......... - 4,000