It shows ROI time table. with an increasing difficulty.
I didn't want to list all the data as it was a lot of data... but here you go:
The numbers on a calculator are so far off you may as well scribble numbers on a wall and throw darts at it. There is no way to estimate difficulty or LTC price that far out so all those numbers are trash.
The reality is, an ASIC miner in this space as a 3 month ROI, a GPU rig will cost twice as much and have more like an 8 month ROI