Zeta Gaming Company has an opportunity to purchase a video game phone app that will cost $216,000. Zeta expects the demand for the app to start strong but to diminish as people tire of the game. The expected cash inflows are as follows: Year 1 $82,000 Year 2 $72,000 Year 3 $62,000 Year 4 $52,000 Year 5 $42,000 If Zeta uses the cumulative approach the payback period for this investment is